Unless you know the lifting GPM or GPH of the diffuser (s) it's all a guessing game.(Meaning knowing how many GPM/GPH the diffusers bring to the surface for every minute/hour of run time) You can go out and measure water temp to see if the pond is homogenized temp wise, but we are getting close to turnover temps so that may not do you any good.

If you can measure O2 levels, go out to the deepest part and measure the O2 in 2 foot increments depth wise and let us know what it is.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).