has any body used marinepure 1.5 inch bio balls and if yes are you happy or not .
i have a 500 liter planted discus tank with 2 big canister filter filled with matrix bio media ,i like to reduce my nitrate to about 5ppm ,i like to know what you think of marinepure as a nitrate reducer ,also any body with any novel idea of reducing nitrate please share it with us.

thanks in advance
sayid