Just noticed this brown algae

[cmj4224]

Hello, I am a novice so please be gentle :)

Recently I had a temp sensor reading way low and then it died which made me realize I had been subjecting my livestock to a seafood boil at about 81F for at least a couple months. I just got that rectified this past week with an InkBird and now I am seeing this brown algae. It doesn't scrap off, not slimy or hairy or anything. It seems to have a growth pattern like coralline, just not pretty purple. Any help or insight would be greatly appreciated, thank you!

My chemistry is:
0 ammonia
0 nitrite
5.5 nitrate
8 pH
1.026 salinity
9.3 alk
1290 Mg
380 Ca
0.03 Pho (I do not trust the visual test, it could very well be zero)


-Chris

 

[mmorrison55]

How quickly did it appear?

If coralline I would have expected it to be gradual over a month or two.

It kind of looks like cyano to me, but if it won’t easily scrape off or be siphoned off, then don’t think it’s cyano.

 

[cmj4224]

I had been nosing around quite a bit with the temp issue that I had over the past couple weeks and I did not notice it. I just saw it this morning so I think it was a pretty quick onset.