Hi guys i'm in the process of getting ready for my grow. here's my problem; i have well water. I had a lady come give me an estimate for a new water softner and water heater because the house need those anyway. she tested the water with a TDS meter and it was 400 ppm. from reading other threads, that didn't seem too far over normal city water. and i expect it to drop once the new water softner is in. I want to use a recirculating DWC setup, and my main concern is the bacteria in the water. long story short, i once grew the bacteria in my water on a petri dish and it was disgusting. plenty of bacteria and entero-bacteria. would those bacteria have an effect on the plants? how would the ppm of my water plus nutes work for the grow? i was looking into a reverse osmosis filter just for the grow to fill my buckets and resovoir. this is the one i was looking at: http://www.freedrinkingwater.com/ro-counter-detail.htm it has an optional UV light that i was thinking i might need. how well does a reverse osmosis filter without a UV light take out bacteria? what would you guys do in my situation? thanks for the input guys, i really appreciate it.