I am not familiar with the use of hydroguard for pests like fungus/root gnats. I thought it was more for keeping the reservoir clean from bacteria/fungus.
But one of our sponsors Sierra Natural Science has a natural pesticide that should take care of the problem. It does look more like a pest issue than a deficiency.
But one of our sponsors Sierra Natural Science has a natural pesticide that should take care of the problem. It does look more like a pest issue than a deficiency.