I know I may get scolded by saying this, but I used the IO natural nitrate reducer and my nitrates went from about 50 to 0 after a few weeks. It's cheaper than buying all the salt for huge water changes, and it has stayed 0 without adding any more of it. I think its about $10 on Foster&Smith. When I set up my tank I used tap water before I realized it was about 80ppm. I did several huge water changes (with good water) but it only went down a little so I finally tried this stuff and it worked great and has stayed at 0. The owner of my reputable LFS
said you need a skimmer for it to work (he didn't sell it to me, I bought it online and asked him later). I also have a large canister filter on my 55 gal
, but don't think you need one for it to work.