Id be curious if its a ph related thing. My nerite likes a ph thats higher, like 7.5+, and my mystery snail seems to like it about neutral, like 7.0, and my ramshorns and bladder snails are doing excellent regardless. I have found a happy medium at about 7.4-7.6 and my mystery snail has just adjusted..
I think it may wrll be a pH thing. I have had trouble with Nerites in low pH environments and in low GH aquariums. I recently killed my poor Nerite, Schnell in a low GH/pH tank. Instead of throwing her away, I accidentally flushed her because I was dumping out some water that was full of floating brown diatoms and I had tossed her into the same container. Well, after flushing, it was too late—I thought—but then two days later, I saw her making her way across my toil bowl! I rescued her from there (don’t even want to think what she’d been through), put her into clean dechlorinated tap water and then over a 24 hour period, I re-acclimated her to the aquarium she had been in. There was certainly plenty for her to eat on the glass and she started across, but early the next day, she had keeled over. I put her into part remineralized RO/DI and part tap water, which is pretty hard water with a very high KH. This happened two more times and each time I was able to resurrect her. Now, Scnell lives with my betta Vincent in water with GH of 5 and a pH of 7.2, which Vincent seems to like. She’s been living there for two weeks, and Vincent seems to be oblivious to the fact he has a tank mate. I won’t try to put her back into my larger, but lower pH aquarium, because I’m not sure if she has nine lives like a cat.
i’ve had four Nerites that lived two-three years, but all were in aquariums with pH of 7.0 to 7.4 because that’s what‘s recommended for Endlers.