I lost my first two tilapia today. The water temperature was just below 90 degrees and the fish were acting more aggressive than I've ever seen before. Both were medium sized fish. Probably females. I have a dozen flower pots on the bottom that I thought might induce mating but no 3 inch pieces for them to hide like in the tank method. I'm not sure if that's the problem. I didn't rule out water conditions. I had been feeding them a lot the last three days. Ammonia was under .25 PPM so that's not the problem. I did a 3/4 water change any way just to be safe, which is not really 3/4 anymore with all those barrels but close. I mostly drained them to see what was going on but the started acting normal as the sun started going behind the mountain at the same time. Any ideas what probably killed them?
