Was wondering if I should put the two catfish that didn't die,the ones I put in the water trough back into the pond. There were a couple more catfish that died yesterday, no other minnows/bluegill/sunfish have died. I did use a trash pump that sucked water from out of the pond and sprayed back a 1 1/2 inch stream of water back into the pond, I did that several times. I checked the dissolved oxygen at noon the next day after I started finding the fish dead.