Lately I've been reading up on water conditions, specifically KH, GH, and PH; currently I only have Bettas and I haven't done anything to alter these levels in their tanks, but I would like to eventually set them up in larger tanks and try to give them as ideal of water conditions for their species as I can (i.e. soft water). I'd also like to eventually set up a large tank with some Glofish who, incidentally, also do best in soft water -- so yet another soft water tank.
Now, I already have two Mystery Snails, which I know do best in hard water due to their calcium needs (that's the reason I've seen mentioned, at least), so I'm trying to figure out if I could keep them in soft water tanks or if they would be best off in "their own" hard water tank. I've been up since about 5a, and I'm working on water changes, so I admittedly haven't been reading too thoroughly and haven't found something that definitively answers my question (that I can see).
If I keep the pH stable and in the proper range for the snails, can I get away with keeping them in soft water but with a calcium-rich diet?
I'm thinking primarily by way of dark, leafy greens if that makes a difference.
Most of what I'm seeing seems to be more focused on making the water harder, which isn't what I'm looking for. Mostly looking for opinions and/or experience -- if it's not advisable then I can figure something out (I've kind of toyed with the idea of a Guppy tank, so perhaps I could put them in there or in their own tank if I can't do the Guppies). Regardless, this isn't an immediate thing. I still have a lot of work to do as far as understanding and figuring out these three aspects of water quality before I start messing around with them.