A pitfall I came across visiting a chap who tried raising aquarium fish by the lake full, he quit doing it when it became apparent raising guppies in numbers kept being hammered by untreatable viruses devastating the fish quality, it occurred to me that the capacity to rotate stock annually to disinfected ponds would seem to be an essential routine, like, a farmer rotates his crops, to avoid legacy problems
“The trouble with quotes on the Internet is you never know if they are genuine.” —Abraham Lincoln