add 1 tsp of liquid food coloring to 1 cup of water, drizzle the colored water onto the soil surrounding the base of a plant and wait 24 hours for the water to absorb, apply another identical dose if the color change was not sufficient
If you swish with hydrogen peroxide everyday you will have the same results plus excellent gum tissue! Recommend swishing with peroxide for minutes morning and night. It kills bacteria that causes decay, gingivitis, periodontal disease. Worth a shot!