hi, not been on for a while, i have always used treated tap water, and never had a problem, but have been seeing that there are alot of people using a part and part tap and bottled water, ie supermarket etc, has or does anyone use this method and if so what are ratios and results, i have approx 8 plecs, L46, L15, L200, L36, etc, all are fine, feeding well etc, so aint going to change what im doing, was just interested in the fact, thanks if you can help, regards bri