I've been watering my plants with tap water. I never had a ph meter and the plants did fine. I recently purchased the ph tester drops and fed the plants once with what was appearantly too low ph'd water.

The plants' leaves began showing brown spots. I'm sure it was because of the low ph. Anyway.....can I just water again with my plain tap water like I was before to correct the problem? It was only 1 watering of the low ph'd water.
TheHerbalist Reviewed by TheHerbalist on . Soil Runoff pH, Flushing to correct lockouts- Why and how to do it! This is a common question that comes up when troubleshooting, so I thought I'd post up a little summin summin. Why do you want to know your runoff pH? Simple- it's an indication of how your water, fertilizer, and grow medium are interacting chemically. There are 3 measurements that are important to know when you are caring for plants growing in a soil or soilless medium. The first is the pH of your source water. Next is the pH of your nutrient solution after the fertilizers and Rating: 5