Just started noticing that the shells on the larger snails are turning white ish. Dont see any other damage, none have died. They share tanks with guppies in a 10 gallon and guppies and cherry shrimp in a 20 gallon
I also use a ph buffer - I have too, the shells get too fragile if not done.
try feeding crab cuisine a few times a week.
I live in South, and my water is super soft.
My large tanks do not do well for snail shells, but 10 and 20 gallons do. I finally gave up and moved my remaining 2 mystery snails into a 20 gallon this weekend. The 38 gallon is just too hard to do it (keep shells healthy) for some reason. Ramshorns in 20 gallons are perfect, but in the 38 gallon they get white and pitted over time.
Crushed coral is for KH and wonder shell will take awhile to raise your GH. Your GH is currently way too low, even if you feed lots of calcium rich foods. You're better off using Seachem Equilibrium for now. You can stop using it after the wonder shell starts dissolving
I have the same problem and essentially the same perameters. Pond snails in one tank turn white and die before full maturity. Rams horns in another tank do the same. The tanks are doing very well otherwise, so I haven't tried changing anything.