I have had my 60 gallon up for a year and a half now ...about 2 months ago I was talked into using purple up to help my corraline growth...well about month into using it I had bad cyano
outbreak which I decided to try and suck up the cyano
and I guess I took too much sand out...now I have a dark brown layer across 3/4 of my tank and on certain rocks...when the lights come on u don't see any but then it gets darker through the day...what is my best option I already change 15 gallons and have been changing 5-10 every 2 weeks but it doesn't seem to be getting better...guy at lfs
said I just have to wait it will go away but is that the truth???