Bought the organic ph down. Only to use it when I cut clones and have to ph water. Been using tap water that I let sit out for a day. Plants seem to be happy ph of the water is 7.9 so I'm guessing the microherd is doing it's job. My plants never looked unhealthy I just was wondering if I could make them grow more optimal. I'm actually satisfied now with the growth organic teas been working great. Fed them a veg tea it had 1 cup ewc, 1 tsp fish emulsions, 1 tsp mollasses and one tsp fox farms fruit and flower. I let bubble for a day and a half mixed it 50/50 with dechlorinated water. Plants are thriving next time I'll add guano to that tea. Got the ingredients for this tea in the newest skunk mag.