I’ve had a relatively successful pond, 8’ x 10’ approximately with a gradual depth of I’d guess 3 +\~. Started with 24 feeder goldfish 7 yrs ago and mosquito fish. A bullfrog and mate, moved in 4 years ago. I just removed the last goldfish 3 days ago plus many dead tadpoles. Some of my surrounding plant life had moved into the pond, calla lilies and cannas, plus a corkscrew willow. Bamboo is trying hard as well. I tried to pull out some of the callas and I guess the muck which stunk did the goldfish in. The mosquitoe fish seem fine. I’m adding water quite often and I don’t know if there is a leak in the liner or the plant life is sucking it up. Any suggestions would be appreciated. I’m in my 80’s and can’t do it myself. Don’t be too harsh I had a very sick hubby during all this. Thanks very much.