From my use of bacteria, enzymes, and air I have noticed decreases in amounts of organics on the bottom. I think that the majority of the purpose of the bacteria and enzymes is to tie up the imediate available nutrients and reduce algae blooms. We have often seen large decreases around diffusers, but some may be due to water movement there. The big thing I think is that having an adequate oxygen level at the bottom allows the other critters to eat the organics along with the bacteria. This is converting the nutrients to weight on your fish. Here in the north most people prefer clear water, which is possible with this program. Make sure that you buy a blend of bacteria with many species. Most bacteria are specifically adapted to feed on one type of food. I agree that more research needs to be done. Some ponds benefit from the use of a rotation of two different brands. Think of the pond as a diluted septic system. [email protected]