[amideutch]

Michael, your high ph is from your water as you said and not your aggregate. So you need to adjust the ph of the water before you use it. Same thing the Hydroponic folks do to their nutrient solution prior to giving it to the plants. Your best bet would be to get a holding tank where you can adjust the ph of the water and put in a pump, either submersable or inline to a hose to water your plants with. Run the output of the pump to a "T" with valves on both sides and have one side run back to the tank. This way when you add the phosphoric acid or whatever to lower the the ph of the water in the tank you can shut off the output to the hose and open the valve so it pumps back into the tank to facilitate the mixing of the water solution. I looked up the fertilome product you mentioned and think for container growing as we do it I would stay away from it and adjust the water like the Hydroponists do as previously mentioned. Ami