Green Crap ID (possible algae?)

[CodeBlueMedic]

Hey Everyone,

So, I've recently had a bit of GHA, but I have been slowly getting rid of that via manual removal and treatment of phosphates. Attached you will see some photos, of which I'm trying to identify the bright green growth on my LR. Seems to be spreading relatively fast.

Thanks for the ID!

 

[CodeBlueMedic]

I tried scrubbing some of it off with a toothbrush and my nail, but it feels like concrete

 

[cloak]

If it doesn't come off the rocks easily, it's probably a prelude to the purple coralline algae we all love so bad.

 

[shesacharmer]

I added some dry rock to my existing live rock. This stuff was white. Gradually it's turning green, pink, purple, then red in various degrees and patches anywhere that it's exposed. Turn the rock and it's still white.

 

[VAReefDog]

If it is hard and doesn't scrape easily- it could be green coraline algae

 

[CodeBlueMedic]

I added some dry rock to my existing live rock. This stuff was white. Gradually it's turning green, pink, purple, then red in various degrees and patches anywhere that it's exposed. Turn the rock and it's still white.

Thanks for the ID! Yup, it's very hard..yay!