snail problem

Random snail popped up in our small tank which has 1 red tail shark and 8 neon tetras. This tank it just does its thing we have another tank that has it’s good times and then random out breaks. But today noticed a snail in the smaller one. I’d say it’s got there from a plant. Wondering what kind...

About a week ago, I purchased two mystery snail. One is brown and one is pale white. I put him in the tank and expected him to take off. He didn't. He sat in his shell for days, easily tipped, not coming out of his shell. I took him out a few days ago and put him a cup I bought my moss balls in...