Anyone know what this is? It’s been spreading the past few days. I got this piece of live rock from my LFS and there was also a little red spot but kind of faint. The last few days it has spread and gotten a deeper maroon color. Any ideas what it is? It’s localized to this rock. Thanks
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@billy
8h
Looks like cyano.If you hit it with a blast of water and it comes off easily then it’s Cyano
@wywy228
7h
Thank you both for the insight. I’ll give that a try tomorrow and see if that’s the case. That rock has been in the tank about 2 months and it just started growing/ expanding the past few days.
@DHood10
4h
Yeah definitely want to get dealt with now. Cyanobacteria is a nightmare once it really takes off
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It's kind of hard to tell. Could be a sponge but it also kind of looks like red sino from this view