i use Rhino Skin for a ph up at 1ml/gal...my water is 6.9-7.0 and clean...so it will depend on your source water as to dosage!

i like using this because it also has a 0-0-13 rating:jointsmile:
stra8outtaWeed Reviewed by stra8outtaWeed on . getting to final stages of bud! need help! leafs! S=Answer if you grow traditional soil - Fox farm Ocean Forest indoor soil FoxFarm Ocean Forest Soil runoff pH - Last time i checked was 6.4 about a week ago E- Tap water from sink E-Source water pH - 6.5 E-Age of plant - week 5 bud almost too week 6 E-Type of fertilizer - Humboldt Nutrients organic line grow - 3-1-3 bloom 0-10-0 duece duece 0-0-22 along with supernatural bud blaster E-Rate of application once a week for the Humboldt system with there feed chart Rating: 5