Understanding Cyano

[qstorm]

Hi all..I am battling cyano a few months, tried everything. Tank is fallow only corals and verts. No carbon or gfo. UV sterilizer running. My flow is two gyre 250 at 100%. Sand bed is only 1" thick.
So here is what baffles me. At night the bloody thing disappears from the sand, barely noticeable on the rock work, but as the halides come on it starts to surface...Even when I go lights out for a few day, it shows up through out the day but goes away at night..

Any ideas..

Thanks

 

[cromag27 Verified Sponsor]

this thread has a lot of great info, including how to verify it’s actually cyano.

https://www.reef2reef.com/threads/cyanobacteria-questions-answers-and-solution.253823/#post-2995690

 

[Lloyd Williams]

You try dosing peroxide?

 

[qstorm]

this thread has a lot of great info, including how to verify it’s actually cyano.

https://www.reef2reef.com/threads/cyanobacteria-questions-answers-and-solution.253823/#post-2995690

Thanks for the info...Will definitely try it

 

[qstorm]

You try dosing peroxide?

No but I will start tonight. Thank you

 

[brandon429]

cures, for pages.

https://www.reef2reef.com/threads/the-official-sand-rinse-thread-aka-one-against-many.230281/page-12

 

[Super Fly]

what is your NO3 & PO4 levels?

I battled cyano for over a year (tried increased flow, reduced light, reduced feeding, more frequent water changes etc) to no avail and finally got rid of it in Aug. What I learned was that cyano kept returning bc my tank was too clean, zero NO3 & PO4. After "dirtying" up the water via increased feeding, less frequent water change and one time chemiclean treatment, cyano never returned. Now I aim for 5-10 NO3 and 0.03-0.10 PO4 by feeding 2x/day w weekly nori/macro algae feeding and few times a week of calen-eeze, which appears to be ideal levels that keeps cyano away and corals happy.

I would siphon the cyano from ur substrate and remove as much from rocks during a water change. Then do chemiclean treatment, run GFO reactor for few weeks (to remove any potential PO4 stuck in the rocks) until cyano no longer appears then turn it off. Then going forward avoid zero levels of NO3 & PO4 and only use GFO reactor if PO4 goes above 0.10, so far I haven't had to turn mine back on.

have to address the cause/reason of cyano or else it'll keep returning.

 

[RichReef]

I have found that the ONLY time I get cyno is when my nitrates reach zero.

 

[qstorm]

Thank you all for your responses...I only have it on one of my rock...I did peroxide for 3 days and it hasn't come back. I don't have any fish in my tank but I feed the inverts and tank twice a day heavily..my skimmer is at the lowest setting and haven't had to change my lights.