Does anyone have tips on dosing nitrates? I have been having some issues with algae lately and learned my nitrates are actually 0. Not a ton of algae but a small amount of dense turf algae on the bottom of the rocks about 2 months after mostly getting rid of it. My tank has been having some sps slowly pale or start to die from the tips while others like my secale and bonsai are doing great and have good color. My alk calc and magnesium are pretty stable those sit at 7.7 to 7.86dkh 470 to 505 calcium and 1440 to 1450 mag based in the past month of my logs. My nitrate tests always appeared to be around 5 to 10 but were a bit old so I got a high range hanna checker and was surprised to learn I'm actually at 0 nitrates. I'm guessing this resugance of algae plus my chaeto is using it all up so I took the skimmer offline but that hasn't made a change yet. Just this week I got brightwells nitrate product to try but so far I have been dosing enough that I should go up a few ppm of nitrates and haven't managed to get it above 0 yet. Wasn't sure if I could dose too much or how much I should do max so I was wondering if anyone else had such a struggle getting theirs up. I just can't believe the rate it's being used up I never clean my sump, don't have socks, and run my refugium before skimmer. If anything I figured my chaeto may be making them high by trapping more detritus and within it and raising it more than it uses it up.