My CC and HBG are not as expensive as your HSB (kidding).
Then why do you need aeration? No aeration in our 1/4 acre pond and NEVER had a fish kill - possible with good management to control over population. Produces quality HSB and CNBG.
N.E. Texas 2 acre and 1/4 acre ponds Original george #173 (22 June 2002)