It appears from Bill's post that I should have my diffusers very near the bottom instead of on 4' risers.
Having them at 10' depth instead of 6' changes the game on PSI, making the Gast 0523 much more appropriate than the 120LL, correct? Looks like it puts out 4.0CFM @ 6PSI and 3.8 CFM @ 8PSI. Vertex says their 9" diffusers are rated 0.5-1.25CFM per disc; seems like I'd need three, maybe four total discs (perhaps dual 2" bases) for that to work properly unless I could somehow restrict airflow from the pump to the diffusers with a valve or something.
Matala 9" diffusers look to be rated 1.4-4.2CFM, and I presume the 12" Matalas are similar; seems like two 12" Matalas would serve my needs.
