I don't know what medium you're using but 1/2 strength Fox Farm nutes plus Open Sesame should not drop your PH that far. Are you using more than 1/4 tsp of the Open Sesame?
grey1223 Reviewed by grey1223 on . Raising PH Hi All I'm am using Fox Farm Nutrients at 1/2 their recommended dosage. I have no problems with the PH until I add the Open Sesame. This tend to turn the whole mix in to straight up ACID. PH 4.0 or Lower. I am using a General Hydroponics test kit, and am having to use a large amount of PH up to get it to 6.0 or better. The PH up contains potassium carbonate and potassium silicate. Should I use some dolomite or something ,to up the ph instead of overdosing the potassium? Rating: 5