I have a 55-gallon used tank that came with several snails. These suckers are the most ugly things I have ever seen: they have a long spirally shell and their mouth appendage looks like a movable arm that they swing all around themselves while hunting for algae.
What I really want is one giant snail to be my algae eater rather than the dozen or so little ugly things. I have a high ph and no live plants, though I would prefer one that does not eat live foliage in case I can ever get live plants in there. What type would anyone recommend? Will it produce offspring if I keep only one? What will it do to the other snails that are already present in the tank?