Is this green coralline algae?

[BitFix]

My tank is about 6 months old, at about 4 months I started getting my first paches of purple coralline, and more recently I started getting some deep red coralline growth. For some time I've had a green algae growing on my glass (it resembles freshwater green spot algae a lot), it's hard to remove, so definitely not green film algae. I've read it's the start of purple coralline, but it's been there for more than a month and not a speck of purple. Could it be green coralline algae?

Parameters:
Salinity: 1.025
pH: 8.1
Temperature: 26.5ºC
NH3 and NO2: 0 ppm
NO3: 2 ppm
PO4: 0.03 ppm
Cálcium: 450 ppm
Magnésio: 1450 ppm
Kh: 6.5 dKH

Here's some photos:

 

[Mastiffsrule]

Evening

hope All is well

It could be. You could leave it for a few weeks and see. it is not so much a green coraline as the start of pink or purple Coraline. it may just turn white if it dies off. Can’t hurt to see what happens in a small area. You can always scrape it off.

 

[BitFix]

Evening

hope All is well

It could be. You could leave it for a few weeks and see. it is not so much a green coraline as the start of pink or purple Coraline. it may just turn white if it dies off. Can’t hurt to see what happens in a small area. You can always scrape it off.

Thanks! I plan on keeping it until I find it's blocking the the view just enough. If it's the start of puple coralline how long will it take to color up?

 

[Mastiffsrule]

Not sure how long. If it is, maybe a few weeks.

 

[Vakko]

Evening

hope All is well

It could be. You could leave it for a few weeks and see. it is not so much a green coraline as the start of pink or purple Coraline. it may just turn white if it dies off. Can’t hurt to see what happens in a small area. You can always scrape it off.

Are you saying that pink/purple coralline start off green?

 

[vetteguy53081]

Its algae. Scrape with good quality scraper or edge of an old credit card

 

[Mastiffsrule]

It can. I’ve seen mine start as a small spec and grow like plates. Other areas I have seen rocks or grass covered in green which will turn to coralline. Trick is to know the difference. Can’t always tell

I just clean glass but 1 pick is my rock with it plating. Then I found a corner I missed scraping. You can still see a bit a green that hasn’t turn yet.

 

[Wampatom]

I was surprised to find green coraline algae. It has remained the same color for 3 weeks. It grows next to pink coraline. I think it is kind of ugly.

The lower two images were taken of scrapings from the glass. The red strands are cyanobacteria about 10 microns in diameter.

 

[Vakko]

I have those same green splotches on the back of my glass.