unidentified growth on Live Rock

saltwater_noob · Apr 13, 2021

A little history about the tank, I bought this setup and tank from someone about 2 months ago. None of the live rock are new, but the tank was very poorly maintained previously with no water changes. I've noticed recently I've had some weird growth on the live rocks and was wondering if someone can help identify what it is and if its harmful to anything inside my tank. It's growing on the rock some what hanging off it too. There is also a dark red/ black / purple spot on the edge of the rock it's hard to capture since it almost looks it's a shadow in pictures. There is also a little fluffy looking thing that just started growing out of it but its too small to be seen.

Ron Reefman · Apr 13, 2021

Welcome to R2R. #Welcome

Hard to say what that is (well, for me anyway!). Is it hard or soft to the touch? I wouldn't do anything about it yet. Give it time and lets see what happens to it.

Good luck.

Rovii91 · Apr 22, 2021

Hey guys, something similar has happened to me, it's not spots but it's more of a smooth spread?

Is this normal for a new cycle using live rocks?
Would appreciate any help on this matter!