Rule #1 is obvious, rule #2 tho is a big plus, and remember, just a few fish from different species can populate a pond pretty fast if the predator count is reduced like it is.
We had a similar event with otters just cleaning out a pond, what we thought was just about completely, We are just starting to get a some pretty good fishing again, re-homing a bunch of otters in the meantime, but they have reproduced and I'm thinking the new offspring are more wise to otters because they were raised around them from day one, unlike the original fish were used to beavers amongst them all the time so they had no fear of them.
