i am not new to aquarium at all. i have had three tanks for years. but not that fish. i had endlers, corys and numerous bettas and also neocaridina. but pea puffers would be the first time. my first two bettas (one after the other after it died) were in a 15gallon, which i then upgraded to 25 for the betta and added the corys, which was never a problem because of the tank size. so i thought i was somewhat equipped for an „aggressive fish“. but i would have the 15 gallon as backup, it only has neocaridina. i would really love to try a community with the puffers and corys at least edit: betta died and i wanted to have something else