Few years back I was trying hydroponic gardening and the roots started to rot. Turns out that there are certain kinds of bacteria that will cause wet roots to rot, eventually killing the plant. Experts in an online forum suggested I buy a bottle of beneficial bacteria and dose that when I changed the water. They explained that the beneficial bacteria would out-compete the destructive bacteria, and it did solve the problem for me. In a week to two the roots went from a dark gooey mess to clean, white, firm & healthy. I did not alter the amount of aeration I was using.
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