The Ice Mountain 3 Liter bottles sold at Wal-Mart is great. pH is around 6.8 and plants seem to love it. The bigger bottle--the 2.5 gallon--has a much higher pH, as do other "natural spring" waters I've tried.

On my last grow, I used the Ice Mountain throughout. Runoff never got above about 7.0.

My .02 on this...and for new growers that are using tap water or bottled water without checking pH, don't do it!
Roughrider Reviewed by Roughrider on . Good, Cheap Bottled Water for your Grow The Ice Mountain 3 Liter bottles sold at Wal-Mart is great. pH is around 6.8 and plants seem to love it. The bigger bottle--the 2.5 gallon--has a much higher pH, as do other "natural spring" waters I've tried. On my last grow, I used the Ice Mountain throughout. Runoff never got above about 7.0. My .02 on this...and for new growers that are using tap water or bottled water without checking pH, don't do it! Rating: 5