I finally got my petco to order some nerites and I bought 3 zebra nerites. I put 2 in my 5 gallon, temporarily, to eat the high amount of algea. That tank gets sunlight every day.
I put the other one in my 20 gallon which is not heavily decorated and gets no sunlight. It does have a coating of opaque algae, the oto is doing fine in that tank.
After a few days the 2 in the 5 gallon are doing great and the one in the 20 gallon has DISAPPEARED! I have one betta in the 5 and one in the 20 but they don't seem to care about the snails.
Has this ever happened to you? Do they crawl out of the tank??? I can't find it anywhere, not even an empty shell