I got a sample of Special Blend from Microbe-lift at IMAC last weekend. Check the stuff out. Its from Ecological Laboratories and they've been in the waste treatment business for something along the lines of 30 years. As a matter of fact, they are the company that cleaned up the rowing pond for the Beijing Olympics. If you recall, it was a real cesspool.
The Special Blend is a different bacteria than the "spore" based products on the market. Having had nitrate and algae problems, I started dosing on Tuesday. My nitrates were at about 10-15 ppm and after adding, cut them down to zero in 24 hours...so far so good.
I am following the dosing plan of weekly for a month then every other week. The bacteria is also supposed to help break down the organic sludge. Corals, fish and inverts are looking fine as well.
The product is FDA and EPA approved. Pretty good stuff so far.