I have to disagree with you on one point, Meyer; Nualgi is not a bottle of diatoms, but a bottle of micro-nutrients for diatoms, which already exist in the pond. Thus, there are no living organisms in the bottle. As I stated a month ago, I've registered the garden center where I work as a distributor for this product, and am testing it on my own pond, trying to keep an open mind. I started dosing the pond on Monday, July 13. At that time the water was so murky that fish had to be in the top 4" to be visible. Treatment was repeated on July 20 with no change in the water clarity, and again on July 27. Two days after this dosing, I could see fish on the bottom of the pond (24") and a day later I could see pebbles lying on the bottom. I have seen similar results in the past, where the pond cleared over the course of a few days WITHOUT any intervention from me, so I'm not saying that the product worked. I will, however, keep dosing at the recommended rate every Monday morning and keep track of water conditions. I also have two customers testing on their ponds, and will see what develops. Also, for what it's worth, I have never used ANY chemical/treatment/remedy/whatever in my pond, and only used a UV unit about three times in ten years to clear up green water.
John