Sorry about the misleading info I gave you. I guess my current grow is more of a recirulating drip. my plants sit above the res in 6" netted pots, and my pump is on a rate of 15 min on, 2 hrs off. But i also use an airstone in the res so the roots from the plants that are hanging in the water get oxygen. This may be too much, as my nutrient solution is already 8" below the bottom of the pots. What advice do you have?