This is what I've just started, I have 4, 5 gallon smart pots. I put an air disc in each one, filled up with 3 inches of perlite, the rest is ffof with added lime and perlite. I fill 5 gallon buckets with 2 gal of ph'd water at 6.0 and put the smart pots directly in the water and turn my 951 gph...