I am interested in knowing if Seachem or anyone has any data on the removal rate of nitrates when using Matrix. A few weeks ago I picked up 1L of Matrix and put 2/3 L in the canister filter on my 55 gallon and 1/3 L in the canister filter on my 20 gallon, so I should be starting to see the effects. Has anyone taken a controlled tank and measured the reduction? Maybe two tanks with no bioload, one with Matrix and one without. I have not seen a Seachem published value of nitrate reduction (ppm/day) or a value determined by anyone. I wont be removing my Matrix, I am just interested in knowing how much it is helping.