I Use RO/DI water and remineralize it with equilibrium. My house was built in 1907 and we get city water. I know they add fluoride and a bunch of other stuff to the water so I just play it safe with RO. Plus I Know that im starting with pure water. Takes water source out of the equation if i run into a problem.
I think im going to go to aquabid and get me some snails!