I posted a thread last week about the compatibility of a mystery snail and a betta. My (well, my 8 year old son's) betta had been housed in about a gallon vase. A couple of you said that there was no way a snail could also go in and suggested that the size was maybe a bit too small for "Mister Betta" (my son is very original, lol!).
So, I upgraded the fish to a tank. It's 2.5 gallons. If I thought Mister Betta was happy before, he's estatic now! It's so much more roomier for him, so thank you for that suggestion. We did add the mystery snail and for the first couple hours he sat in his shell. Then he came out and started climbing on the walls, the "No Fishing" sign, etc... It was quite cute. However, over the weekend he hasn't come out. He'll partially come out, but then go right back in. He hasn't moved from the one spot he's in on the tank floor and he's on his back. I tried flipping him over, but he went right back on his back.
Now, the fish I noticed this morning is diving at it and fanning out his fins. I don't think the snail is dead since I've read that it smells like rotten eggs and they'll float. Is it possible the betta nipped at him or something causing the snail to hide? Or should I take the snail back to the aquarium store? We've only had him since Thursday.