I have 2 questions.. the first one is the one I'm most concerned with. I am looking into setting up my old 20gal again, but my tap water has a sulfuric smell and when the water evaporates from my turtle tank, it leaves a white residue that I believe is mineral deposits. I haven't purchased a test kit yet, but I am assuming that my water is hard, but I just don't know what to make of the sulfur smell. It's not an unbearable smell but it is noticeable; the water is otherwise clear, tastes fine, and the turtle (local species) seems to be ok. Would this be a problem for a freshwater aquarium?? Also, I live in a basement room and my nearest source of water is the hose faucet in the garage.. I'm not really able to haul buckets from upstairs so boiling water is not an option. I have a water cooler jug that I intend to use so I can let the water sit overnight, and (as I am going to get a new, better heater) I can use my old heater to warm it up some. Currently for the turtle, I've been taking him out and using my coffee pot to add hot water to the tank so I can maintain temp. I have a small heater for him but it's not good for heating up water, but will maintain the temp once I get it up there. My 2nd question is this- I want to get the Top Fin Hollowed Out Driftwood ( ) as a centerpiece. If you go to the link and scroll down to customer reviews, there is a picture someone posted of it in their 20gal tank. It will take up my tank but it looks neat and and has lots of holes for fish to swim through and hide in. I am considering getting either danios (Glofish) or neon tetras, but I'm not sure if this piece of decor would be ok for them or not. I know the neons like plants, and the danios like swimming space. I would already be pushing it with the danios because my tank is high, not long, but they are a consideration because all the info I keep getting about neons is that they can be sensitive and a little tricky to keep. If I go with this decoration I would also be adding some fake plants, but would that be ok for either of those species?? Would it take up too much space for the danios, or would they enjoy swimming around and through it?? Would neons feel comfortable with it, or would something smaller and more plants be better?? Are there other fish that prefer driftwood that would be more suitable??