I might have brought this before but it is quite perplexing and has been going on for at least 3 years. Suddenly, all fish will stop taking feed (Aquamax 600). Last night, they were feeding normally, tonight maybe 1 or 2 came up but it was basically dead as a door nail.I knew what the remedy was and what it has been...add 1 gallon of bacteria to the pond (1 acre). Literally within 10 minutes of adding the bacteria, the fish were once again feeding like piranhas. Any guesses what's going on? It's happened time and time and time again, so there's no other variables, it's definitely the bacteria. The bacteria I normally use is "Natural Pond Cleaner" by Sanco; Bact-Pur "Pond" also seems to work but not quite as quick. I've tried other brands and they don't work.

Could it be excessive fish waste? This pond is packed full of fish, I'm way over the limits for a healthy pond. I lose a lot of fish as the pond floods badly during heavy rains, I've been relying on this to manage the fish but because of the drought, the pond has not gone over the emergency spillways in at least a year.