Just got a note back from County Agent. He feels that for the home gardener that 1 DROP of household bleach PER GALLON of water, is about as close as we can practicaly get to the 10 to 50 ppm. or 1 tsp in 1,300 gal. Any other idea's Byron Note to gals who think a man should want a woman for her mind or inner beauty This is the Amish philosophy. So all females dress alike, keep hair covered same hair style, no make up and no jewlery. Only hands and face are exposed.