• Welcome back Guest!

    MARSH is a private reefing group. Comments and suggestions are encouraged, but please keep them positive and constructive. Negative threads, posts, or attacks will be removed from view and reviewed by the staff. Continually disruptive, argumentative, or flagrant rule breakers may be suspended or banned.

What is this fuzzy stuff on rocks?

Arame

Guest
Joined
Sep 13, 2019
Messages
13
Reaction score
28
Location
Cypress
So my tank is about 3 months old and I’ve started to see this white fuzzy/hairy stuff growing on the top side of my liverock. I’ve tried scrubbing it with a toothbrush and it doesn’t really come off. It’s not really green so I don’t know if it’s algae, could it be bacteria?




Sent from my iPhone using Tapatalk
 

Luman01

Supporting Member
Build Thread Contributor
Joined
Mar 25, 2017
Messages
1,067
Reaction score
312
Location
Richmond
It’s not bacteria, you cant exactly see it with the naked eye. It could be Dinos but I’ve never dealt with it. But @Matyas and @frankc have had those battle hopefully they can chime in
 

frankc

Supporting Member
Joined
Jun 11, 2012
Messages
846
Reaction score
453
Location
The Woodlands
It doesn't really look like dinos to me - they are a golden brown and they come off pretty readily. I don't know what it is. One guess would be tiny hydroids, but I can't tell.
 
Top