Tsuh writes: > why such drastic measures? snails need some minerals in the water (to build > shells). if you keep your water soft and acidic, their population will > decline. I keep apistos, and the water is at 3ºGH, pH 6.0. It hasn't bothered the MTS at all. they just keep going and reproducing. I could go all the way to pure de-ionized, but the plants would die off before the snails do.