Very light blueish color coraline or something else?

[AZMSGT]

On my back glass I’m getting a very very light blue thin hard film on there. When I scrape it it’s very resilient to scraping. I get surface brown algae on the top of it that scrapes off easily and this film is much tougher.

In places I have scraped this off it will come back starting as a small circle and grow into a larger and larger circle.

I think it’s coraline, but the coloration is really odd.

right side is after I scraped off the surface algae.ignore all the junk floating around that’s from the scrapings.

 

[old salt reefer]

Nice dino garden on the rocks. Looks like mine.

 

[AZMSGT]

Nice dino garden on the rocks. Looks like mine.

diatoms and Algae.. it’s starting to get ravaged by the snails so not worried about it.. back to the question, is that stuff on the right side Coraline or something else?

 

[Musovski]

whats ya nitrates vs phos. looking like?

 

[AZMSGT]

whats ya nitrates vs phos. looking like?

0-0

 

[Musovski]

0-0

hmmm. Idk, never really heard of blue coraline..Purple, pink but never really blue, i may be wrong.

I was thinking a blue cyano

 

[AZMSGT]

hmmm. Idk, never really heard of blue coraline..Purple, pink but never really blue, i may be wrong.

I was thinking a blue cyano

It’s nothing like Cyano. It’s practically calcified to the back wall and bare tank bottom. Very tough to scrape.. much like coraline.. And I also never heard of light blue Coraline.. that’s why I’m utterly lost.

I was wondering if the pigmentation of the Coraline is being dampened by something.. I’m running the WWC lighting schedule on my Radions.

I only have three test corals in my tank and my Alk is always dropping so I dose 17ml to maintain 7.9dkh.

 

[Musovski]

It’s nothing like Cyano. It’s practically calcified to the back wall and bare tank bottom. Very tough to scrape.. much like coraline.. And I also never heard of light blue Coraline.. that’s why I’m utterly lost.

I only have three test corals in my tank and my Alk is always dropping so I dose 17ml to maintain 7.9dkh.

ii have no idea then.

#reefsqaud

any idea?