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.