Help, I am lost for words most my fish are dead, I have a opening with a aerator and water shooting up for movement, about I put a heater in the pond and now the heater does not work? but the water is still open, I have the pond for 2 years and never lost a fish,, could it be a bad heater? large and small koi and comets stuff at the bottom? not a lot, some died a month ago some today
Thanks
Thanks