Weird Stuff In My Aquarium

[Nano]

If your talking about the fuzzy stuff to me it just looks like detritus. I got some bad rock and I would blow it off then a day or so later it would be back. Try testing your water for phosphates with the light out at night after its been out for a few hours. If the tanks new, and you got the rock second hand sometimes it has a pretty bad build up of crud in it.

Mind you I could be 100% wrong and it could be something else. But to me it looks similar to what I had before I started getting green hair algae problems in my tank. Hopefully others will chime in with opinions

[lastlight]

I have the same stuff. Looks like dead hair algae a bit but it actually has a few branches from each point of origin. I was wondering if it was a sort of hydroid...

I toothbrush them away but they do grow back. Flourish in lower light / under my overhangs. They also trap detritus really well and look shaggier over time.

If my stuff is not like yours excuse the random post lol.

[Reefaddict]

Originally Posted by Nano

If your talking about the fuzzy stuff to me it just looks like detritus. I got some bad rock and I would blow it off then a day or so later it would be back. Try testing your water for phosphates with the light out at night after its been out for a few hours. If the tanks new, and you got the rock second hand sometimes it has a pretty bad build up of crud in it.

Mind you I could be 100% wrong and it could be something else. But to me it looks similar to what I had before I started getting green hair algae problems in my tank. Hopefully others will chime in with opinions

It's an established tank that has been running for over 2 years. A bit of a crash recently but all corals survived. Redecorated the landscape and cleaned up most of the detritus. Phosphate level close or at 0. Didn't have much of a hair algae in the past. Just annoying because I have seen other gorgeous aquariums without these little buggers.

Originally Posted by lastlight

I have the same stuff. Looks like dead hair algae a bit but it actually has a few branches from each point of origin. I was wondering if it was a sort of hydroid...

I toothbrush them away but they do grow back. Flourish in lower light / under my overhangs. They also trap detritus really well and look shaggier over time.

If my stuff is not like yours excuse the random post lol.

Not at all. All comments appreciated.
In fact, it is exactly as you described. I would use a toothbrush or a turkey baster to blow it off and it would reappear. I do wonder if it is dead hair algae as well.

[lastlight]

When I turkey baste the detritus off the branches still remain. When I use the toothbrush they all break off. In my case def not hair algae. Certainly harmless though from what I've observed.