You may have otters or flatheads, or Blue cats in the lower ponds cleaning them out of sizable fish, if its otters they will be in yours before you know it cleaning it out.
I have a few old mine pits that I fish in, deep and a lot of fun but we also have a few higher up in the hills that will not support fish for whatever reason, Ive thrown some fish in them just to get things started and they die right off within the hour.


All the really good ideas I've ever had came to me while I was milking a cow.