Lowering the pH of tap Water.
I am growing six sweet pepper plants in ebb and flow system using 100% perlite as the medium and Hydrogreen Hydroponic Plant Food in Arrowhead Distilled Water as the nutrient solution. The plants are growing furiously and I'm losing 0.4 gallon if nutrient every day (Through transpiration?) This will make any peppers I get off the plants very expensive at $3 for a 2.5 gal plastic jug of DW and I'd like to switch over to tap water-based nutrient. The pH of the local Long Beach tap water is 8.0 - 8.2, and I'd like to bring it down to about 6.5.
Can I do it, and how?