Canyo Wont Go Away

I have found that where there is cyano there is a build up of detritus caused by dead spots in the tank. Short term you need to use a turkey baster or power head to blow it off the rocks and/or siphon it off during water change. Long term, increase and/or change up your flow to eliminate said dead spots.

 

I too have found cyano is directly related to flow and excess nutrients.  Once these problems are fixed it usually goes away, sometimes it can be stubborn and keep coming back though.

 

I'd agree with the previous posters who suggest that cyano is a combination of flow and nutrients. Shooting it with a turkey baster will uproot it and allow our skimmer to remove some of it. You might still have still areas in a tank that has pretty good water movement.

 

I'm not so sure all the time about it being related to flow and nutrients. Certainly that pertains to 99% of the cases out there. But I have a 40BR that is on the same system with my DT (which is cyano free). The 40 has an mp20 and a korallia 4 in it, sand is frequently turkey basterreddd, and I still have rampant cyano in there. For cases like this....I might go to the chemi clean

 

Once I got my bio-pellet reactor established  I finally got rid of any cyano and hair algae problems.  I have always fed my tank heavily and still do.  I did add a GFO reactor and carbon reactor since my phosphate always seems to be high (from the feeding, I'm sure) but I prefer my fish & coral to be fat and happy.  Zero nitrate, zero cyano, zero hair algae though.  I have also read once you have zero nitrate, the bio-pellet reactor can't remove phosphate either, another reason for the GFO reactor.

 

Is it possible that is is diatoms? On my old FOWLR tank, I did 40% water changes every week, cleaned the glass, and siphoned the sand. After 3 to 5 days, I would have a new outbreak of diatoms...every week. This went on for years and I thought it was normal, but looking back, I was causing the tank to cycle anew with every cleaning.