Hello! I am relatively new to keeping aquariums but I definitely do my research before jumping into anything and consider myself a diligent fish keeper. I would like to start a dwarf puffer tank, however as I am moving soon I think I'd like it to be a small one. I've read this is NOT the consensus for DPs so I'm curious; if I plant my tank well enough and give it enough to interact with, can I keep just one DP in a 5 gal tank? I've read a lot about dwarf puffers but can't seem to find much info on keeping/ setting up a tank for just one. If I were to do this, what would be a recommended filter for this small tank with one messy fish? I plan on using a turkey baster to feed and avoid further waste. Also, do I need a heater? If so, what would you guys recommend for a tank of this size? Thanks so much for any input!