[cgjedi]

I have been doing some research into phosphate and nitrate in the water. I came across some interesting information about chitosan - made from shellfish - a natural polymer. It is used in treating waste water and filtration. It adsorbs heavy metals, phosphate, nitrate. Does anyone know if any commercial aquarium products use this technology?

http://www.physics.uoguelph.ca/psi/papers/Bacteria %26 Biofilms/Bacteria_EPS%26LPS/Gotoh_Chemosphere_03.pdf

Here is recent research from Ontario: