Hey guys ya'll got room for an aero guy in the conversation ?--- I use 35 gallon storage containers --Big black boxes with an orange lid with a checkerboard pattern !--- I use about 10 gallons of nute water with a filtered 396 gph pump pumps straight up thru a PVC manifold with micro sprayers !-- Anyway I run a bubbler in each box --Just a regular 2 inch diameter air stone !--- My bubbler is not an attempt to dissolve O2 into the water !--- Sure some may dissolve but my air pump and stone is for air exchange inside my boxes !--- The roots are just hanging there and can obsorb all the O2 they want from the air in the boxes as long as it is not stale !--- So all this talk of DO and venturi stuff and bubble size just really don't apply to my aero systems !-- Just one less thing for me to worry about !--- H2O2 in my res. ? --I don't think so !-- I use Richie Riches hydro tea as an additive got like 35,000 species of beneficials !-- About a cup per 10 gallons of nute solution per week !--