We had two Nerite snails in our 5 gallon tank with one male betta and three GS, but one Nerite "bit the dust", so we started looking for another one. None of the LFS's had any, so we decided to get a Ivory Mystery Snail. I knew very little about them, but got one. After getting it, found out that they can eat live plants, stroll/eat along the bottom quite a bit, poop quite a bit and grow to twice the size it is now. These things our Nerite snails don't do! Thing is, if this Mystery snail eats stuff on the bottom, that will take away food for the three Ghost Shrimp we have.......that wouldn't be good!
They/Mystery Snail is pretty cool looking snail and being able to watch it crawl along the bottom is pretty neat. It has crawled up and down the sides of the tank, but right now is sticking to the bottom.
Because of the things that this Mystery snail does, that the Nerite doesn't, will get another Nerite and get rid of the Mystery. Don't want my live plants eaten or have a bottom full of "poop"!