piranhaking67;4581359; said:bass,carp,catfish,sturgedon. and if its heated arapaima,arowana,catfish,
Don't do carp. They are to a koi what a wolf is to a dog. And they'll cross breed and you'll get some ugly fish lol.
I second the mosquito fish though. Breed like rabbits, eat bad stuff, and feed the good stuff.
If his yard was fenced off I'd say throw in a basking spot and add some turtles. But without a fence there's a good chance they'll just wonder off.
lol