10 gallon??.. it's his heaven!!

yeah sure, you can put him in with other community fishes.. I've tried my purple/white betta, spirit into goldfish (chandler & speckles)'s 6 gallon, they're doing great. for yours, make sure you watch every minute for first hour..then check closely over 24 hours.. (just like some bettas would flare, some wouldn't)..

oh yeah, goldfishes make such a mess, they eat like they haven't eaten..lol and leave 'food' all over. but what I have, filtration and it helps clean good, better than changing water up to 30% too much.

good luck giving betta's new life.

oh ps, walmarts and PETCOs have sick bettas! beware.. petsmart is only the chained-store who would think of animals, not profit..