Kaycy writes: << I have been using what is known as the Ramshorn Snail in my tanks for the > past 12 years. They grow to a good size and are easy to control if you don't > want them to overtake your tank. I mainly use them in growout tanks and have > also had them in apisto tanks as long as I am careful of live plants. Like, > I said, I have mainly used them for the growout tanks. >> Kaycy- Are these the small Venezualan type which reach about 1/2 inch, or the brown and white Columbians, which are actaully more closely related to the apple snails?