I have a 2.5 gallon tank, with 2 mystery snails and 2 small fish that I am unaware of the species. No lid, just a tank, with sand, rocks, and a few plants. I have a filter and air pump too. I let my snails go out sometimes, only when Im watching. If so i will try to put them back down, but if they go, they go. But one of mine recently fell off the tank and chipped the side / front of its shell. Please tell me what I should do, Im worried. I don't wanna superglue it, or should I let nature do it thing? Please tell me. Thanks. ( Also the picture and tank is cloudy because of the sand... I realized I had to put the sand in first... Letting the filter complete it and make it non-cloudy, and the snail that has the chipped / broken shell is the black / brown snail. ) Please tell me if the picture is not good enough, I will get a close-up one if you need to see the chip.