Hey so i have a 30 gal tank and really like the pea puffers. But i am worried they wont fit well with other fish im also looking at. Right now i have 3 red eye tetras( will move up to 6-8 once cycled) and 4 black molly. I really like the albino cory also. Can all of these mix? Ive heard and read they can be not so friendly. But im also pretty new and i just want to plan for my tank.