Ok, my water has a low PH (~6.1) and there is iron and copper in it (it's well water). I can't have any inverebrates with this, right? What about spring water that I'd buy at a grocery store (Poland Spring water or Deer Park)? Would I be able to use that? Also, it's a 2.5g tank, how many shrimp/snails could I put in there. It'll be planted.