I'm considering a 70 or 90g corner tank and want to have a couple agressive fish. Looking at porcupine puffer, trigger, eel, possibly a lion fish.... So my question is, how do you guys clean up uneaten food with no clean up crew? My porcupine I had before made a mess, little pieces of meat sank to the bottom all the time where it would just rot without crabs/snails. What is the best way to keep a couple of these guys in a tank?