But your insisting on the EC having to be checked. I understand the Ph is vital and has a narrow margin of error but the EC can vary widely from 0.4 - 3.4 , all depending on plant size and desired results obviously but the Ph will always be the same as the plant will/can only absorb certain elements at certain Ph levels.
The reason I say flush the medium is its coco and inert so to get back to square 1 basically. Then add nutrients as required to the EC level needed.
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