Bill, I finished my 3rd application of the 10-52-4 soluble doing 2 week increments, last weekend. This morning I noticed what looked like a light green film that had developed overnight on about 1/3 of the surface area of the pond. I think this is part of the bloom that I have been attempting to get myself. I used about 8.3 lbs on my little 1.5 acre pond during each application. My alkalinity is low at 30ppm compared to others, but I've been told and read above 20ppm is good. My water PH is around 7.4 to 7.5.

I bought some tub of fertilizer from the local feed store that had a big pond boss recommended sticker on the side of it. You pull off the side stickers and place it in the water on a platform. Its supposed to be some time release type. I'm thinking that since it appears I've gotten a slight bloom, putting in this time release should keep everything pretty much in check now for the rest of the year.

John