Just wondering, since I wanted to get some ramshorns and kuhlis for a future tank, but kuhlis being loaches, I was concerned that the snails would be eaten.
Not all loaches eat snails, and kuhlis aren't particularly good snail predators. In the wild, they prey on small invertebrates typically in the substrate, stuff like chironimid larvae, blackworms, tubificid worms, and the like.
The best snail eaters, among loaches anyhow, are members of the family Botiidae.