Im un coco coir 100%. I have a very high output EC around 2.3 in some girls and 1.8 in others. All this with an input EC of 0.2. I'm doing a sog on a 7L with 3 hps. Given the high number of plants, I cannot wash them one by one and I am doing an irrigation with drainage of +-10% since I have large trays and they flood very quickly. I have been watering only EC 0.2 water for 3 weeks and the problem is that not all the girls lower the output EC equally and I have also read somewhere that watering only water does not help to lower the EC so much. They say that with the EC a little higher the salt attracts the sla and goes down more. My question is: Should I lower the EC by adding water alone or with some EC or just water? Is it bad to only water only water to lower ec ? Are you missing nutrients? Im week 5 flower. Thx in advance!!!
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How lower EC !!
- Thread starter Sweetknz
- Start date
is the coco washed? prebagged? brick?
What ph you watering at?
You gave nutes before or have any ideea on where the high ec runoff might come from?
Coco is usually flushed with half the usual ec you are feeding, so not to destroy CEC. Do you use the proper Cal Mag levels in your feed for coco?
What ph you watering at?
You gave nutes before or have any ideea on where the high ec runoff might come from?
Coco is usually flushed with half the usual ec you are feeding, so not to destroy CEC. Do you use the proper Cal Mag levels in your feed for coco?
High EC come from vegetative stage i feed with no EC measuring on drainage.
crimsonecho
Well-known member
i’m not a coco grower so take it with a grain of salt. i think what you should do is to run plain phed water till you lower the ec significantly and then feed with proper ec and ph and call it a day.
Miraculous Meds
Well-known member
Feed 1 ec 5.8 ph to run off, of base nutrients till you get to your target run off ec. But your run off ec isn't bad. You need base nutrients to keep the cec correct in the coir so the plants can uptake nutrients. Don't feed plain water ever until before harvest.
Like f-e said you need to raise the amount of run-off with the same nutrient water. You are not allowing enough discharge for an equal ratio between water and coco. More discharge to lower EC. 
Bertolacci.luca
Member
From my experience, flush flush and still flush till you have right EC. Than restart again with your nutrient program 
What do you flush with?From my experience, flush flush and still flush till you have right EC. Than restart again with your nutrient program
Sorted 
Coco takes a fair bit of maintenance. If you wash out the cations, it will grab them back from your feed. Or the cations of K and Na that coco de-composure constantly releases, are perfectly positioned to take up the places left from washing away others like Ca and Mg. Reformulating the available elements in your substrate. Thus, a water flush, leads to a new set of problems. A shift from Ca availability to Na availability being quite problematic. As Na will replace K, giving a soft green rot prone plant. When you wanted Ca hardening cells up.
That's not the full story, but of obvious concern. Our coco comes treated to be something usable, maintained by coco feeds that are formulated in ways such as higher Ca and lower K in order to maintain the right balance as long as possible.
If you really want to use a lower feed for flushing, then use calmag to keep the Calcium and Magnesium levels unaltered. Calmag will also provide N which isn't much of an accumulation problem. There is usually Iron added to. Using calmag you can lower the feed portion of what they are getting. Which means less P and K being given. Which are likely the accumulating salts, along with the Na which both Ca and Mg can displace with their stronger bonding potential. This, flushing with calmag is better than flushing with reduced Ca and Mg. For coco.
Coco takes a fair bit of maintenance. If you wash out the cations, it will grab them back from your feed. Or the cations of K and Na that coco de-composure constantly releases, are perfectly positioned to take up the places left from washing away others like Ca and Mg. Reformulating the available elements in your substrate. Thus, a water flush, leads to a new set of problems. A shift from Ca availability to Na availability being quite problematic. As Na will replace K, giving a soft green rot prone plant. When you wanted Ca hardening cells up.
That's not the full story, but of obvious concern. Our coco comes treated to be something usable, maintained by coco feeds that are formulated in ways such as higher Ca and lower K in order to maintain the right balance as long as possible.
If you really want to use a lower feed for flushing, then use calmag to keep the Calcium and Magnesium levels unaltered. Calmag will also provide N which isn't much of an accumulation problem. There is usually Iron added to. Using calmag you can lower the feed portion of what they are getting. Which means less P and K being given. Which are likely the accumulating salts, along with the Na which both Ca and Mg can displace with their stronger bonding potential. This, flushing with calmag is better than flushing with reduced Ca and Mg. For coco.
