Is it coralline algae

[TankLife87]

I have this growing on a lot of rocks on my tank since I changed to my salt to Red Sea coral pro salt.
Coral growth and Parma’s seem great.

This algae is dark purple and doesn’t seem to be growing like coralline algae I see on pump heads or other surfaces.

Maybe I’m paranoid but is it dark coralline or some invasive bag algae?
I turned on the white lights on the tank to get a good pic.

Using radion xr30 pro gen 4.

 

[Brian Stewart]

I had that algae when I had little flow hitting that area. I dont believe its coraline.

 

[ndrwater]

Looks to be Cyano. Try blowing it off with a turkey baster or something similar. My guess it comes off easily confirming Cyano.
Coraline is very hard and would need to be scraped off to get it off of rock or glass.

 

[TankLife87]

The part pictured is taking a pretty good constant flow from and mp40 power head
Below is a pic of the whole tank. You can see the power head on the left side that is right in front of the mp40

 

[TankLife87]

Anyone else able to help?

 

[DangerDave]

does it blow off easily? Then like posted before it’s probably cyano.

 

[TankLife87]

does it blow off easily? Then like posted before it’s probably cyano.

That is the thing. It really doesn’t come off easily.

 

[DangerDave]

well then I wouldn’t think it’s cyano. Is it hard and encrusting like coralline? There are different coralline colors...

 

[rkpetersen]

Looks like a purple encrusting coralline algae to me. If you have to scrape at it pretty hard to get to the bare rock underneath and it comes off in little hard chunks and flakes, it's coralline.

 

[HB AL]

If it doesn’t blow off easily with a turkey baster, it’s not cyano, there are different shades of coraline.

 

[cracker]

looks like coraline to me !

 

[Hemmdog]

I had growth like this when I got live rock from Tahiti, they grew into sponges. Hard to tell though, might just be dark coraline.

 

[Brian Stewart]

Take a toothbrush to it if it comes off its shouldn't be coraline

 

[Brian Stewart]

Do bubbles appear on it?

 

[Brian Stewart]

I had some algae that reminded me of velvet. that's what that looks like to me

 

[TankLife87]

I had some algae that reminded me of velvet. that's what that looks like to me

Yes. It does look like velvet kinda of. Any remedy on what type of algae it was?

Thanks
Clayton

 

[Brian Stewart]

It showed up when I got new lights. I almost had a tank crash. So all my coraline died off. And then that algae showed up. Always high and in the lower flow areas. So I'm guessing the higher par from new lights combined with flow that was not strong but medium flow. Combined to grow this. Took about 3 weeks to get rid of it. But I have a big tank so it took longer. After time it just faded away.

 

[Brian Stewart]

What is your nitrates and parameters at?

 

[TankLife87]

What is your nitrates and parameters at?

Nitrates .3ppm
Alk 10.2
Phosphate .06
Calcium 410

I have been managing phosphate for a few months now. It was at .4 until I started running gfo and have been doing weekly 25% water changes

 

[miguelpatricio]

Jumping on this old post: I'm finding some purple spots on my rocks. It is not very easy to scrape off. Is it too optimistic to hope that this is coralline algae?