algae tuff scrubber nitrate remover

Has anyone put nitrates and or phosphate remover in their ato water/container? I’m currently using gfo but I can’t get my phosphates low enough, I have some algae starting to grow on the rocks. Also, nitrates won’t budge… I’m not home enough to continuously feed although I do have a auto...

bought and never used. it is currently as received in box. $250 shipped, will ship via USPS priority (2-3 days). West coast or Texas buyer pays $10 more. Paypal only.