Fuzzy stuff on rock?

[Skifflexie]

Hey guys I bought a used 75g tank a few weeks ago. It was pretty gross, algae everywhere. The rock was in a bucket for transport. Once we cleaned the tank, I rinsed the rock with RO water. I didn't really look it over, just threw it in; it was 1am lol.
After the tank cleared up, the rocks have fuzzy hair stuff on them, is it old algae?


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[Sniperhank]

Looks like it could be the remains of hair algae.


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[Skifflexie]

What is the best way to get rid of it?


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[Sniperhank]

Scrub it more. Hyrdogen peroxide will kill it...and everything else as well. I usually mix it in some old tank water to a 1-10 ratio and let it sit for half an hour and scrub at it.

 

[carey]

Thats what the rock looks like after I use peroxide on it lol. Just the dying algae, it should fade away or blow off in a few days usually. If it takes hold again and starts coming back then you might wanna do a dip with the peroxide, but as mentioned above, it will kill anything "alive" on the rock.