Originally Posted by kingCA
From what we know in coco we are taught to not use flush with straight water due to cation exchange. How does this apply when adding additives such as compost teas, molasses, kelp etc?
If I add a compost tea, this only consists or RO, molasses, and compost. In theory wouldn't this throw the cation exchange?
What if I'd like to add water with only something like molasses or kelp added as many do?
We could mix with nute solution, but in the case of compost tea this would negate the the freshly brewed bennies.
That's not how coco works..you're always feeding (multiple times per day for established plants) at an average or slightly lower EC (adjusting for feeds per day plus environmental factors such as VPD and available light).
Even when flushing you still buffer RO water...preferably with carbonate and not nitrates..and you never flush without nutrients except for the last couple days..but you should've been lowering ppms appropriately the last weeks to the point where a 'flush' isn't needed. All your doing is killing the plant off, plain and simple..see in soil the plant self regulates..it knows its produced flowers and is about to die so it stops feeding..but with inorganic salts that are water soluble..they are instantly chelated and absorbed whether the plant wanted it or not..so you as the grower have to mimic the plants natural biological activity..
Gonna use this post as opportunity to rant..lol...YOU DO NOT NEED MICROBIAL ACTIVITY WHEN USING INORGANIC, CHELATED SALTS. THATS THE WHOLE FUCKING POINT. Elements are made available through chelation..and in our case of inorganic salts they are forms such as EDTA, etc..in SOIL microbes perform the chelation through enzymatic activity (which is produced as a biproduct of their metabolism, hence the use of molasses and likewise as a form of carbohydrates). You are receiving absolutely zero benefit in your attempts to blur the lines between soil and soilless growing..pick one or the other..