After 3 years of poor success with our pond it appears this year is the best ever. 1st year we had neighbors watch the pond while we went away for 2 weeks and the drunken fool flooded it and all the fish died. I still think something else happened to kill them...like his son threw in the light post and electrocuted them...second year herons got them. Now this year we found a couple of baby fish but were able to rescue only one from their cannibalistic parents...although eating your children has some benefits...just kidding of course! Hope to learn lots from this forum. BTW pond is about 11 ft x 8 ft and 3.5 ft deep, would be deeper but a big rock was in the way. Filtration is TerraTeck (?) canister and some phony box filter with fountain pump. We have a small aeration pump in there too. Thanks for reading! Also we live north of Seattle in Lynnwood WA.