{"id":243393,"date":"2026-04-07T16:21:38","date_gmt":"2026-04-07T14:21:38","guid":{"rendered":"https:\/\/drain-master.de\/2026\/04\/07\/drain-ec-too-high-when-to-flush-your-cannabis\/"},"modified":"2026-04-07T16:21:38","modified_gmt":"2026-04-07T14:21:38","slug":"drain-ec-too-high-when-to-flush-your-cannabis","status":"publish","type":"post","link":"https:\/\/drain-master.de\/en\/2026\/04\/07\/drain-ec-too-high-when-to-flush-your-cannabis\/","title":{"rendered":"Drain EC too high? When to flush your cannabis"},"content":{"rendered":"<article>\n<p class=\"intro\">Normal or Panic? What Your Runoff Says. <\/p>\n<h2>Drain EC vs. Input EC: Why Your Runoff Tells the Truth<\/h2>\n<p>A <strong>drain EC that\u2019s too high<\/strong> is the classic problem that shows you something is seriously wrong in the substrate. Many growers only focus on the EC value of their nutrient solution, but the real truth about what your plant is actually absorbing and what\u2019s accumulating in the pot is only revealed by the water that drains out the bottom \u2013 the drain or runoff. If you learn to read these values correctly, you\u2019ll have the key to healthy plants and fat harvests in your hand.  <\/p>\n<div class=\"woocommerce columns-1 \"><ul class=\"products columns-1\">\n<li class=\"product type-product post-2267 status-publish first instock product_cat-coaster product_cat-garden-supplies has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/drain-master.de\/en\/product\/drainmaster-drip-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-image__wrapper\"><a href=\"https:\/\/drain-master.de\/en\/product\/drainmaster-drip-stand\/\" title=\"DrainMaster incl. tub (Set size configurable)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"shoptimizer-plp-carousel-container\"><div class=\"shoptimizer-plp-image-wrapper\"><img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"DrainMaster Single set\" srcset=\"https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-300x300.jpg 300w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-1019x1024.jpg 1019w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-768x771.jpg 768w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-1529x1536.jpg 1529w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-990x994.jpg 990w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-441x443.jpg 441w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-100x100.jpg 100w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-150x151.jpg 150w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2.jpg 1991w\" sizes=\"(max-width: 360px) 147px, (max-width: 300px) 100vw, 300px\" \/>\t\t\t\n\t<\/div><\/div><\/a><\/div><div class=\"woocommerce-card__header\">\t\t\t\t\t<p class=\"product__categories\"><a href=\"https:\/\/drain-master.de\/en\/product-category\/garden-supplies\/coaster\/\" rel=\"tag\">Coaster<\/a>, <a href=\"https:\/\/drain-master.de\/en\/product-category\/garden-supplies\/\" rel=\"tag\">Garden supplies<\/a><\/p>\t\t\t\t<div class=\"woocommerce-loop-product__title\"><a tabindex=\"0\" href=\"https:\/\/drain-master.de\/en\/product\/drainmaster-drip-stand\/\" aria-label=\"DrainMaster incl. tub (Set size configurable)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">DrainMaster incl. tub (Set size configurable)<\/a><\/div><\/a><p class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>24,99\u00a0<span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span><\/bdi><\/span><\/p><\/a><a href=\"\/en\/wp-json\/wp\/v2\/posts\/243393?add-to-cart=2267\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2267\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2267\" data-product_sku=\"DM-01\" aria-label=\"Add to cart: \u201cDrainMaster incl. tub (Set size configurable)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDrainMaster incl. tub (Set size configurable)\u201d has been added to your cart\" role=\"button\">Add to cart<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2267\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t<input type=\"hidden\" class=\"pmwProductId\" data-id=\"2267\">\n\t\t\t\t\t<script data-cfasync=\"false\">\n\t\t\t(window.pmwDataLayer = window.pmwDataLayer || {}).products                = window.pmwDataLayer.products || {};\n\t\t\twindow.pmwDataLayer.products[2267] = {\"id\":\"2267\",\"sku\":\"DM-01\",\"price\":24.99,\"brand\":\"\",\"quantity\":1,\"dyn_r_ids\":{\"post_id\":\"2267\",\"sku\":\"DM-01\",\"gpf\":\"woocommerce_gpf_2267\",\"gla\":\"gla_2267\"},\"is_variable\":false,\"type\":\"simple\",\"name\":\"DrainMaster incl. tub (Set size configurable)\",\"category\":[\"Coaster\",\"Garden supplies\"],\"is_variation\":false};\n\t\t\t\t\twindow.pmw_product_position = window.pmw_product_position || 1;\n\t\twindow.pmwDataLayer.products[2267]['position'] = window.pmw_product_position++;\n\t\t\t\t<\/script>\n\t\t<\/div><\/li>\n<\/ul>\n<\/div>\n<h3>What the EC Value Really Measures<\/h3>\n<p>Simply put: The EC value (Electrical Conductivity) measures the electrical conductivity of your water. The more salts, i.e., fertilizer, dissolved in the water, the better it conducts electricity and the higher the EC value. The input EC is what you mix and put into the pot. The drain EC is what remains after the journey through the root ball. If this value is dramatically higher than the input, it\u2019s a clear alarm signal for salt buildup in the substrate. A good measuring device like the <a href=\"https:\/\/drain-master.de\/en\/product\/apera-ec60-premium-conductivity-pocket-meter\/\">Apera EC60 EC Meter<\/a> is your best friend for this.     <\/p>\n<h3>The Main Causes of High Drain EC<\/h3>\n<p>Most of the time, the problem is self-inflicted and can be traced back to three core points. First: simple over-fertilization. You\u2019re giving more nutrients than the plant can process. Second: incorrect watering behavior. If you always give only small sips and never produce sufficient drain, old, unabsorbed salts are never flushed out. They accumulate, and the concentration in the root zone skyrockets. Third: evaporation. Especially in hot temperatures, water evaporates from the substrate surface, but the salts remain and concentrate.       <\/p>\n<h3>Not All Substrates Are Created Equal<\/h3>\n<p>It\u2019s crucial to understand how your medium responds. Soil has a certain buffering effect and is more forgiving of small mistakes. A one-off high EC value in the drain doesn\u2019t have to cause immediate panic. With coco or rockwool, it\u2019s different. These substrates react much more directly and have hardly any buffering capacity. A high EC value affects the plant almost immediately. That\u2019s why, with any substrate, the trend matters more than a single measurement. If the drain EC keeps rising steadily over several watering cycles, you need to take action.       <\/p>\n<h2>From \u201cNormal\u201d to \u201cEmergency\u201d: How to Interpret the Values Correctly<\/h2>\n<p>The numbers on your EC meter are not arbitrary values, but direct feedback from your plants. You just need to learn to speak their language. A high <strong>EC value cannabis<\/strong> in the drain is a cry for help that you shouldn\u2019t ignore.  <\/p>\n<h3>The 2x-3x Rule as an Early Warning System<\/h3>\n<p>A simple rule of thumb helps you with quick diagnosis. Compare your input EC with your drain EC: <\/p>\n<ul>\n<li><strong>Drain < 2x Input:<\/strong> Everything is in the green zone. The plant is feeding well, there is no concerning accumulation. <\/li>\n<li><strong>Drain 2x \u2013 3x Input:<\/strong> Time to pay attention. Salt concentration is increasing. Slightly reduce the fertilizer amount at the next watering and ensure more drain.  <\/li>\n<li><strong>Drain > 3x Input:<\/strong> Red alert. There is a serious problem here that requires immediate action, as nutrient lockout is imminent. <\/li>\n<\/ul>\n<h3>Symptoms of Salt Buildup<\/h3>\n<p>If your <strong>drain EC is too high<\/strong>, the plant often shows very clear signs of stress. The tricky part: Inexperienced growers often interpret these as nutrient deficiencies and add even more fertilizer, which fatally worsens the situation. Look for burnt leaf tips and edges (nutrient burn), dark green, almost leathery leaves, downward-curling \u201cclaws,\u201d and a sudden stop in growth.  <\/p>\n<h3>Nutrient Lockout: When More Fertilizer Makes Everything Worse<\/h3>\n<p>This is the great paradox in cultivation: an excess of nutrients can prevent the roots from absorbing any nutrients at all. The high salt content in the substrate creates osmotic pressure, making it difficult for the roots to absorb water. As a result, the plant \u201cwilts\u201d despite moist soil and shows deficiency symptoms, even though the substrate is full of nutrients. This is the classic nutrient lockout.   <\/p>\n<h2>First Aid When Drain EC Is Too High: The Flushing Guide for Emergencies<\/h2>\n<p>If the readings are critical and your plants are already visibly suffering, there\u2019s no time to hesitate. Panic fertilizing is the wrong approach. The only effective emergency measure to remove excess salts is flushing.  <\/p>\n<h3>When Flushing Is the Only Solution<\/h3>\n<p>Flushing is not a standard procedure, but a last resort. Use this method if you see clear symptoms like nutrient burn and your drain EC exceeds three times your input EC. The goal is to completely reset the substrate and wash harmful salt accumulations from the root zone.  <\/p>\n<h3>How to Flush Correctly \u2013 Step by Step<\/h3>\n<p>A flush is simple, but it has to be done correctly. Follow these steps: <\/p>\n<ol>\n<li><strong>Prepare water:<\/strong> Use water with a very low initial EC, ideally below 0.4 mS\/cm (RO water is perfect). Adjust the pH of this water to the optimal range for your substrate. Never add fertilizer!  <\/li>\n<li><strong>The right amount:<\/strong> Flush the substrate with two to three times the pot volume. For an 11-liter pot, this means slowly running 22 to 33 liters of water through. <\/li>\n<li><strong>Check drain:<\/strong> Continuously measure the EC value of the runoff water during flushing. Your goal is to bring the drain EC as close as possible to the EC value of your flushing water. <\/li>\n<\/ol>\n<h3>The Restart After Flushing<\/h3>\n<p>After flushing, the substrate is practically \u201cnaked\u201d and the roots are sensitive. Let the pot drain well and dry out a bit. The next watering should then be done with a greatly reduced nutrient solution, about 50% of the normal concentration. This gives the plant a chance to recover without immediately overloading it again.   <\/p>\n<div class=\"woocommerce columns-1 \"><ul class=\"products columns-1\">\n<li class=\"product type-product post-92318 status-publish first instock product_cat-untersetzer product_cat-gartenbedarf has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/drain-master.de\/en\/product\/drainmaster-xl-single-set-incl-tub\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-image__wrapper\"><a href=\"https:\/\/drain-master.de\/en\/product\/drainmaster-xl-single-set-incl-tub\/\" title=\"DrainMaster XL incl. Tub (Set Size Configurable)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"shoptimizer-plp-carousel-container\"><div class=\"shoptimizer-plp-image-wrapper\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"DrainMaster XL\" srcset=\"https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-300x300.jpg 300w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-600x600.jpg 600w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-1024x1024.jpg 1024w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-768x768.jpg 768w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-1536x1536.jpg 1536w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-990x990.jpg 990w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-441x441.jpg 441w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-100x100.jpg 100w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-800x800.jpg 800w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1-150x150.jpg 150w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/12\/1-4-1.jpg 2000w\" sizes=\"(max-width: 360px) 147px, (max-width: 300px) 100vw, 300px\" \/>\t\t\t\n\t<\/div><\/div><\/a><\/div><div class=\"woocommerce-card__header\">\t\t\t\t\t<p class=\"product__categories\"><a href=\"https:\/\/drain-master.de\/produkt-kategorie\/gartenbedarf\/untersetzer\/\" rel=\"tag\">Untersetzer<\/a>, <a href=\"https:\/\/drain-master.de\/produkt-kategorie\/gartenbedarf\/\" rel=\"tag\">Gartenbedarf<\/a><\/p>\t\t\t\t<div class=\"woocommerce-loop-product__title\"><a tabindex=\"0\" href=\"https:\/\/drain-master.de\/en\/product\/drainmaster-xl-single-set-incl-tub\/\" aria-label=\"DrainMaster XL incl. Tub (Set Size Configurable)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">DrainMaster XL incl. Tub (Set Size Configurable)<\/a><\/div><\/a><p class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>39,99\u00a0<span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span><\/bdi><\/span><\/p><\/a><a href=\"\/en\/wp-json\/wp\/v2\/posts\/243393?add-to-cart=92318\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_92318\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"92318\" data-product_sku=\"DM-01-XL\" aria-label=\"Add to cart: \u201cDrainMaster XL incl. Tub (Set Size Configurable)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDrainMaster XL incl. Tub (Set Size Configurable)\u201d has been added to your cart\" role=\"button\">Add to cart<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_92318\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t<input type=\"hidden\" class=\"pmwProductId\" data-id=\"92318\">\n\t\t\t\t\t<script data-cfasync=\"false\">\n\t\t\t(window.pmwDataLayer = window.pmwDataLayer || {}).products                = window.pmwDataLayer.products || {};\n\t\t\twindow.pmwDataLayer.products[92318] = {\"id\":\"92318\",\"sku\":\"DM-01-XL\",\"price\":39.99,\"brand\":\"\",\"quantity\":1,\"dyn_r_ids\":{\"post_id\":\"92318\",\"sku\":\"DM-01-XL\",\"gpf\":\"woocommerce_gpf_92318\",\"gla\":\"gla_92318\"},\"is_variable\":false,\"type\":\"simple\",\"name\":\"DrainMaster XL incl. Tub (Set Size Configurable)\",\"category\":[\"Untersetzer\",\"Gartenbedarf\"],\"is_variation\":false};\n\t\t\t\t\twindow.pmw_product_position = window.pmw_product_position || 1;\n\t\twindow.pmwDataLayer.products[92318]['position'] = window.pmw_product_position++;\n\t\t\t\t<\/script>\n\t\t<\/div><\/li>\n<\/ul>\n<\/div>\n<h2>Pro Strategy: Keeping High EC Values Under Control Permanently<\/h2>\n<p>An experienced grower doesn\u2019t just react to problems; they prevent them from the outset. Instead of waiting for an emergency where the <strong>drain EC is too high<\/strong>, you establish a routine that keeps the system stable. Proactive management is key.  <\/p>\n<h3>The 20% Drain Rule for Consistent Cleanliness<\/h3>\n<p>The best way to prevent salt buildup is to not let it happen in the first place. With every single watering that includes fertilizer, aim for about 10-20% drain. This means if you give 5 liters of nutrient solution, about 0.5 to 1 liter should run out the bottom. This \u201cflushing through\u201d removes excess salts before they can accumulate to critical levels. A consistent, slight drain is like regular cleaning for your root zone.    <\/p>\n<h3>pH as the Crucial Partner of EC<\/h3>\n<p>You can have the perfect EC value, but if your pH is off, it\u2019s all for nothing. The pH value controls which nutrients the plant can absorb at all. If the <a href=\"https:\/\/drain-master.de\/en\/2026\/04\/07\/optimal-cannabis-ph-value-the-guide-for-soil-coco-hydro\/\">optimal pH value for cannabis<\/a> is not within the correct window (soil approx. 6.0-6.8, coco\/hydro approx. 5.6-6.2), deficiencies and nutrient blockades will inevitably occur, even with ideal fertilizer concentration. EC and <strong>pH value cannabis<\/strong> are a team that you must always consider together.   <\/p>\n<h3>Regular Measuring Instead of Guessing<\/h3>\n<p>The foundation of a successful harvest is knowledge, not guessing. Analyzing the trend over several watering cycles is the key to success. However, constantly lifting heavy pots to collect the drain is tedious. This is where clever solutions come into play. To accurately measure the <strong>EC value runoff<\/strong> cleanly and effortlessly, you can use a <a href=\"https:\/\/drain-master.de\/en\/product\/drainmaster-drip-stand\/\">DrainMaster Drip Stand<\/a>. This catches the drain directly in the tray, allowing you to effortlessly <a href=\"https:\/\/drain-master.de\/en\/2023\/04\/27\/stress-free-measurement-ph-and-ec-values-without-raising-the-plant-pot\/\">measure pH and EC values stress-free<\/a>. This turns regular monitoring from a tedious chore into child\u2019s play, and you prevent your <strong>drain EC from getting too high<\/strong> from the start.      <\/p>\n<figure style=\"margin: 2rem 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 8px;\" src=\"https:\/\/drain-master.de\/wp-content\/uploads\/2026\/04\/infografik-6-scaled.webp\" alt=\"Drain EC 3x higher than input. - Infographic\"><\/figure>\n<h2>Frequently asked questions<\/h2>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Why is my drain EC so much higher than the input EC?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">This is a sign that unused nutrient salts are accumulating in the substrate. Your plant absorbs more water than nutrients, which increases the nutrient concentration in the remaining water. A slight increase is normal, but it becomes critical when the drain EC is 3x higher than the input, as this indicates harmful salinization.  <\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">When do I need to flush my plants if the drain EC is too high?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">As a rule of thumb: If the drain EC rises above twice the input value, you should monitor the development closely. As soon as the drain EC is 3x higher than the input or even exceeds this value, immediate action is required. Flushing with pH-regulated water removes excess salts and prevents nutrient lockout.  <\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Is there an ideal EC value for the drain?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">There is no single ideal value, as the drain EC must always be evaluated in relation to the input EC. A healthy range is usually below twice the value of your nutrient solution, which indicates good nutrient uptake. On substrates like coco or rockwool, the drain EC should even be very close to the input value to avoid problems.  <\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Is a high drain EC as bad in soil as in coco?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">No, there are big differences here, as soil stores and buffers nutrients. An elevated drain EC is therefore more normal and less critical in soil than in inert substrates like coco or rockwool. In coco, however, a drain EC 3x higher than the input can lead to massive root damage after a short time.  <\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">How do I measure the drain EC correctly?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">Collect the runoff water in a clean tray after watering your plant with sufficient drain. Wait a few minutes for the liquid\u2019s temperature to adjust to the ambient temperature to avoid measurement errors. Then immerse your calibrated EC meter in the collected liquid to read the value.  <\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">What does the 20% Drain Rule mean for watering?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">The 20% rule states that about 20% of the water supplied should run out of the bottom of the pot with each watering. This excess flushes old nutrient salt deposits from the substrate, preventing accumulation. It also ensures that you get a representative sample for an accurate EC measurement.  <\/p>\n<\/details>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Normal or Panic? What Your Runoff Says. Drain EC vs. Input EC: Why Your Runoff Tells the Truth A drain&hellip;<\/p>\n","protected":false},"author":1,"featured_media":243394,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Drain EC too high? When to flush your cannabis","rank_math_description":"Is your drain EC too high and you're wondering why? Learn when high values are normal and when you need to act. 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