Don't kid yourself, fish can jump very high and if there is enough room for air to get through a fish will find it if they really want to. Fish jump for different reasons, some get spooked, some are bullied, some just jump because it's fun to fly, it's the landing part that ruins the fun.
Egg crate is easy to cut up, it's not expensive unless you go to the chrome stuff and then it's very expensive.
Doug
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