I have had nearly a 2 month battle with cyano. I've done weekly 15% water changes along with vacuuming the sand every time and it comes back within 2/3 days every time. I have also tried a 3 day blackout that helped but only for about a week after the lights came back on. After that I dosed chemiclean with the recommended amount and my tank was cyano free for about 2 weeks and now its back and I feel like I'm making no progress. My plan now is to just let it do its thing for a couple weeks, no water changes and see if mother nature just deals with it. There is another type of algae on my sand and it seems wherever it goes, the cyano doesn't. Not sure what to do at this point. All of my water I make with a brand new BRS 6-stage and it reads 0TDS and RedSea pro salt(black tub). Not sure if I'm taking the right approach here but I'm at a loss for what to try at this point besides ripping the tank apart to clean.
Reefer 170 (43Gal system)
running ROWAphos in my reactor
filter sock changes every 4/5 days
protein skimmer during the day
feed reef frenzy daily and a half dose of reefroids into the water column
water:
35ppt (refractometer)
Alk 7.8 dKH (RedSea Foundation)
Nintrate- 2 (RedSea Marine Care)
Phosphates- 0.09 (Hanna)
White light just for pictures
Reefer 170 (43Gal system)
running ROWAphos in my reactor
filter sock changes every 4/5 days
protein skimmer during the day
feed reef frenzy daily and a half dose of reefroids into the water column
water:
35ppt (refractometer)
Alk 7.8 dKH (RedSea Foundation)
Nintrate- 2 (RedSea Marine Care)
Phosphates- 0.09 (Hanna)
White light just for pictures