Hi, I've had the same experiences with my snail's, the Gold sadly not lasting very long, I always put it down to the fact that they need cooler water than the other's and they're more sensitive to changes in parameters. So I usually avoid them now ☺
55 gallon elephant nose tank.
30 gallon boraras , red longfin bristlenose, bamboo shrimp, crs,rcs and different snails.
7 gallon halfmoon betta and red ramshorn.