Point taken, enough on the confusion, a little more on the aeration portion.
The system that has been working well on my 1.2 acre pond, 11 feet deep;
HiBlow 120LL pump. One pump, not half dozen. 3 diffuser heads, Vertex XL2 (double 9"), Matala 12", and homemade one. 85ft run from barn to pond gate-valve station, 3/4" pex tubing underground. 92ft run from valve station to Vertex diffuser, 3/4" pex tubing. 240ft run from valve station to Matala diffuser, 3/4" pex tubing. 60ft run from valve station to homemade diffuser, 3/4" pex tubing. Diffuser depth was 11ft for the first year on all diffusers, now 9ft, for thermocline reasons. 3rd summer of almost nonstop running, timer off for 8hrs maybe 14 hot days a years. Maintenance, cleaning the inlet air filter with warm soapy water, once a year. Power draw is 90 watts on cool days, up to 101 watts on hot days, (snap shot of last 24 hrs attached). Noise level is a whisper.
The Matala diffuser, even though has the longest run (325ft), it has the best flow and must be throttled back, to divert more flow to Vertex. Thus Matala - very low back pressure by comparison. Back pressure = 4" of water (.144psi) as advertised by Matala. Good value.
Vertex diffuser, puts out slightly finer bubbles. Good quality.
Homemade diffuser is 3/4" pex tubing, in a hula hoop, with #80 drill bit holes inside and out. Probably will be replaced with another Matala.
All the diffusers are mounted to a milk crate, to keep off the bottom.
Pump is controlled by a WiFi outlet, that I can enable timer function, or turn off anytime. The power meter chart attached, is from that app. But, I believe leaving it running almost 24-7-365 is easier on the pump and the diffusers, so hot days that last only a day or two, it stays running.
