Cannot get rid of cyano!
 

Showed up about a month and half ago.

I have:

Physically removed it by blowing it off the rocks and vacuuming it off the sand. comes back within 3 days to cover everything again.

Been running GFO inside of a reactor

Ive got through 2 large bottles of fozdown

Did a water change.

removed the sump and fuge and completely cleaned them and reinstalled them.

i dont know what else to do, i dont think going lights out for a few days is an option.

anyone have any suggestions

i also made sure there isnt any phosphates in my RO water.

I don't have any suggestions but I'm dealing with it too. I had never had it before and one day it shows up out of nowhere and it's been a thorn in my side ever since.

I've added a more extensive CUC, including sand sifting starfish, to help with the problem but I haven't noticed any help.

After a few weeks mine *seems* to be dying down now. All I did was lower the intensity of the LEDs by a bit and started feeding a less.

Tagging along because I wouldn't mind a few new tricks myself.

Not sure what you guys are running for lights but I had a huge cyano outbreak when my T5 bulbs got old. I ran them for about 9 months with no problems, then the cyano started with a little here and there, which got worse, and worse. I changed out my bulbs and the problem went away.

I had the same problem in my tank. Was blowing it off the rocks, sucking up what I could off the sand, cleaned out the sump, didn't make a difference. I have since added a dual reactor running carbon and gfo, added a sand sifting star (he would avoid the cyano and go around it, wouldn't move on top of it). I did adjust the location of my powerheads slightly and lowered the light intensity as well. I've added a make shift refugium with cheato and another macro algae and added a orange diamond goby. I think the goby has made a world of difference. I need to move a couple of corals as his nightly burrying under a rock has pushed sand up against a couple lps, but otherwise, my sand is spotless and he doesn't spit sand everywhere, just basically gulps it and sifts it out wherever he is. Rest of the CUC is able to keep up with the rocks. Its been 3 weeks and no return of the cyano.

for some reason I get cyano from Jan to April every year and then it goes away.... whether I attempt to do anything about it or not

Did anyone try to increase flow to the areas where cyano is present? I know it's pretty basic but I don't recall anyone talking about flow. Some chemicals have also helped me but I recommend some caution if going that route.

Chemi clean. I fought it for a long time... didn't want to use it... gave3 up, tried it and it was cleared up in 3 days. Never came back. Also, no adverse effects.

i have recently added another MP40 and an MP10. cyano seems to be the worse(thick and sticky) in high flow areas

+1 on the chemiclean, had battled for @ 3 months, followed instructions, no adverse effects, took @ 4 20% WC to get my skimmer to settle down,
ran 2 air pumps til then, glad I did it.