Hello! I just joined, thank you. Our family has two bettas that were labeled at Petco as “baby females”...we quickly got a second tank as one betta seemed to constantly be pecking at the other (smaller) betta. Our tanks are the 2.1-gal Imagitarium filtered, and we have a small heater in each. One betta grew much larger more quickly, and has flowing fins, while the other has remained smaller and more compact, so I am wondering if one was mislabeled and is really a male?? My question somewhat has to do with that, as we got a single snail for each tank for “cleaning” purposes (and just because it’s fun to have an “ecosystem”). This was about 3 months ago. The snail in the smaller betta’s tank is still gliding around actively. The first snail in the larger, showier betta’s tank died about a month and a half ago, so we got another snail. I noticed last night that this new snail has also now died. I put it in a small bowl with tank water to be sure, and it’s lying there with the door open and the insides slightly poking out, unresponsive to touch. I have only seen the betta peck at it once or twice when it was first placed in the tank, but I am wondering if this larger, more territorial betta is killing the snails. These are my daughters’ fish, and she was sad about the first snail, so will also be sad about this one and will want another. Is there anything else living that can go in this tank, or is this my indication to let this betta have it’s entire territory to itself?? Thank you for your help!