Yep you are right it binds the crap then your skimmer will pull it out but make sure you have a good skimmer

I had my nitrates up to 10ppm at the start of the year when my tank sort of crashed and lost a few SPS corals. I used this AZ-NO3 for about 14 days straight and it dropped my Nitrates down from 10ppm to Zero. My Nitrates are still Zero but i still use it ever 4th or 5th week for about 4 days straight just for maintenance. It had no effects on any of my corals or clam. But i do recommend to dose it very slowly and do not over dose with it. It's very similar in dosing vodka