Any idea what this guys?

[Curtis Rose]

The tank is almost two months old
Rock was pre cycled in a brute

Nitrate 5
Phos. .07
Cal 420
Alk 8.5
Mag 1300

Dosing with Carbo calcium. I know Carbo calcium utilizes a small amount of carbon dosing from what I read I wouldn’t expect this Because it is such a small amount. And it’s only in this one particular spot nowhere else in the tank. Any ideas?

 

[Mr Fishface]

To be totally honest here - I don't see anything. What are you looking at exactly?

 

[Aqua Man]

The fuzz? Algae in the making?