is this cyano?

[bboyin4lyf]

i have this blood red batch on the underside of some of my live rock that i recently acquired. it doesnt look like the other coraline alge that was on the rock so i was wondering if its cyano bacteria and whether its harmful.
it looks "slimy" if that helps. thanks

 

[Anonymous]

We need a picture. There is a species of Coralline Algae that looks and feels just like Cyano. I suspect that's what you have since it's underneath the rock but can't be sure.

Regards,
David Mohr

 

[ChrisRD]

Touch it - if it rubs off easily I'd say it's cyano. If not, I'd guess coralline...

 

[bboyin4lyf]

is cyano particular bad? or does it have no effect?
ill try rub it off later

 

[ChrisRD]

Many new tanks have a bout with cyano in the first few months and then it may disappear for good. It can come and go, even in mature tanks. It's sortof a warning sign that your nutrient levels are getting high, but generally it's not tough to get under control. Usually increased skimming, better source water, good circulation, and control of nutrient inputs will beat it back...