firebirdude
User and Abuser
Most any grocery store, including WalMart sells distilled water in the bottled water aisle. Like 80 cents/gallon. Measured it several times from various bottles purchased various times. Always measures 0 TDS. That said, any of that bottled water will work in a pinch. I've never measured TDS on "spring water" or "drinking water", but I'm sure it's under 100 TDS....which is better than any tap water.
To cap it off, several people on this message board claim to top off with tap water regularly. I think it's asking for an algae out break, but if their tank is hardy enough to take up the excess phosphate etc, then so be it. Lucky them. But for the 99% of us, avoid tap water.
To cap it off, several people on this message board claim to top off with tap water regularly. I think it's asking for an algae out break, but if their tank is hardy enough to take up the excess phosphate etc, then so be it. Lucky them. But for the 99% of us, avoid tap water.