IMO, yes. And yes to the fuzzy dwarf lion fish. People are going to say that your tank is too small for a porky puffer but you can get away with it if he's small. I have a bta and my puffer doesn't touch it, not sure of the eel but probably ok. Make sure you have a very good lighting system for your bta. I have 4.7 watts/gallon for my bta which is adequate.