If moving fish not using pure O2 and a specially built air stone for the O2, I wouldn't exceed 1/4 pound per gallon of water. 1/2 pound per gallon of water with O2. You have to watch the O2 level (which needs an O2 meter). Too little and the fish die. Too much and you burn their gills. Ideally you want to be between 7 and 15 mg/L O2.

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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).