I might get one to put Pineapple in with a couple other fish. What else can I get? My dad wants a community tank with Pineapple (cuz that's his fav fishie <3) that we can put in my room in the new house. What fish can I put in there (with my really tiny betta fish Pineapple)?
IMO, with a 20 gal. tank you could EASILY have some cories for the bottom and a nice school of Harlequin Rasboras with your betta. Nice, small (but not small enough for the betta to eat), peaceful guys.
Female guppies, small pleco's, small loaches ( Kuhli loaches), tetras, hatchetfish, exotic catfish, wood cats, banjo catfish, corydoras catfish, cherry barbs, shrimp (except macrobracium), marbled crayfish, clams (so long as the aquarium has been running for 6 months and/or has tons of floating matter), otocinclus, there are many more, just search online and at LFS.
Won't a crayfish eat the betta? Also, aren't MOST tetras fin nippers?
Marbled crayfish are the exception. They are all female, self clone, and leave fish alone (unless you starve them). I keep two with my male and they are fine, even with the smallest shrimp. Some tetras fin nip, some don't. It really depends on the tetra species and the amount in the group. Generally tetras with neon tetra shaped fins seem to be less nippy. I would definately recommend banjo catfish. Although they rarely move (most people don't use nets, they just pick them up. Even if you drop them back in the water, they won't swim), they are very cool. They shed skin, have the appearence of a dead leaf, and luve burying themselves. I wouldn't get them, cory cats, or loaches without sand though.