Hy atoll. As you said you have an ATS SCRUBBER. I have too, also i am dosing carbon ( vinegar/ vodka). My no3 still at 25ppm. 30ml vinegar and 3ml vodka per day with bacteria biodigest. Water changes every 7-15 days 15%. 500lit reef with full soft and lps corals, 3 big tanks small fishes and a lot frozen food a day(6-7cubes) and flakes. I am thinking to buy oxydator A for the begining with one catalysts and then go to 2 catalyst if everything is ok. ( i have tried 2 ats scrubber full to algae but my coral closing every day,more carbon doses but white slights to glasses,but nothing,no3 25) My no3 drops to 20-15 with water changes only every week 20-25,% but it was very expensive. I was wondering if you use carbon and if you had a no3 reduction using oxydator. Thanks, Bill
An Oxydtor won't reduce your NO3I am afraid. If you NO3 hasn't come down then either your ATS isn't big enough or perhaps you don't have enough surface area to grow denitrifying bacteria in. The carbon doing is to encourage denitrifying bacteria (as far as I am aware) to grow but if there is not enough suitable places for it to colonise then it isn't going to work efficiently. I have used NoPox in the past to good effect
o bring down NO3.