the tap, of course, that fiend! My tap water is really bad. Apparantly I live in the area that Erin Brockovich was about (Seriously).
How would I get the metals out of the water?
Back when I had me senegal I used RO water from a nearby water store. would there be a problem doing that again? Of course some of the other tank water will get into it when I kickstart the cycle with filter media but I imagine it would be fairly minimal