keeping water beetles

[FSM]

They are neat. I've kept a group of cybister in a 10 gallon before. I fed them frozen shrimp and crickets.

 

[Timthedrifter]

well I found a few stuck in the filter and a few other just disapeared, leaving me a lone beetle zipping around the top. I may put a sponge over the intake to help them out and collect some more. I was only able to get one pic, he never stops moving.