I have always had nitrates around 40 to 50. I fed 2 times a week for corals fish get pellets daily sometimes they get frozen. I broadcast fees reef roids if I don't have time. If I have time I spot fees thick reef roid paste and coral frenzy. I had to scrub tank every day 2 days you wernt seeing in it. I could clean 2 times a day to make it look clear. Sand was getting discolored. Hair algae growing. But my chaeto wouldn't grow. I decided carbon dosing as I was getting tired of it. Tank is 3 months old no water change yet as my ro crapped out. But the rocks and some sand and corals came from a 1 year old tank. Everything has been good, had to dose once to raise my alk. So anyways I took my 2ml syringe and filled it with vodka. I put in .2 a day then upped to .3 after 3 days. I noticed at day 2 not much algae to clean. Didn't check nitrates. Just used up the 2ml today and my nitrates are undetectable. I am amazed at this, I never thought it would work that fast.