I used 1 1/2 teaspoon for a gallon, possibly a little less. I'm going to check my ph again when I get home. So you advise me to try the wood ash? Should I also get the humic acid nutrient today and ad it into my super soil also to see if it helps? I've also read about humic acid lowering the ph. Also, is there something besides wood ash I can possibly buy from a hydro store to also help my problem? Not sure if ill be able to find wood ash.