Strange ATS Algae

[Johnson556]

First time cleaning my ATS since I’ve hooked it up to my new 180G about a little over a month ago. When it was on my 90 it pulled a nice thick green algae, on this tank not so much. Currently going through my diatom bloom since I added new sand. All the rocks are spotless.

Any idea what’s going here. The ATS currently has a 10 hour photo period.

Parameters
Salinity: 1.026
No3: 1ppm
Po4: undetectable on Hanna checker
Alk: 8.5
Calc: 440ppm
Ph 8.1-8.2

 

[Brew12]

No3: 1ppm
Po4: undetectable on Hanna checker

I suspect this is what is going on.

Not enough nutrients in the tank to support significant algae growth.

 

[Johnson556]

I figured the same. I feed a fair amount as well. Cant believe nothing is detectable.

Current Stock: Yellow Coris Wrasse, Melenarus Wrasse, Flasher Wrasse, Marble Wrasse, 3x Yellow Tangs, 2X Purple Tang, Spotbreast Angelfish, Pair of Clowns

Daily:
-Half a sheet of Selcon soaked Nori
-2-3 frozen cubes
-Acropower

Reef Roids 2-3 Times a week