I just bought a cheap ph meter until I can buy a good one. I know that they are not too accurate due to hotspots an what not so I have been testing the runoff water as well as the soil. I haven't used any nutes yet so im not worried about the npk. im almost positive its a micronutrient problem. Maybe a dunb question but can I use the ph down I would use for my jacuzzi? Also... what about dolomite lime or sulfer products? Thanks for your time...