Hi all, wondering if I could get some help figuring this out and what all I could do. I finally (knock on wood) got rid of my cyano issue caused by nopox. My phos is almost always 0.04 and nitrates are currently 14.2 (both tested with Hanna). I had to reduce nopox to 2ml/day on my 120g system due to the cyano issue. I do regular water changes, typically 30g every 2 weeks, but would LOVE to do them less frequently and somehow get them under 10 consistently. Any ideas? Still don’t understand why the nopox fueled the cyano so much in the first place. Tank is just under a year old.