It's excellent. I use it stand-alone for my hydro system, the 2part, and I add TopMax and molasses approximately whenever I remember to.
stinkyattic Reviewed by stinkyattic on . Rising ph level? Our tap water comes to us at a ph level of right around 9.0 with 20 ppm of tsd. I use PH Down to lower it to about 5.8 using a calibrated digital meter. I store it in an opaque, 3 gallon container, placed in the grow room. I was trying to get my plants run-off to be around 6.0, so i was checking the water before i used it. It seems to have gone up over a full point in about a week. The room has a 1,000 watt mh in it now. I was wondering if the PH Down is light sensitive? Anyone ever noticed Rating: 5