0 PO4

[stevenVDB]

no matter how much po4 + I doses the tanks still reads 0

I dose 0.04 po4 daily on the doser. Outcome stays 0.
I’m testing with Hanna, tried different lot nrs
It’s been ongoing since a month now. Tester is still accurate, I’ve tested it with a buddy’s tank.

My tank is 6 months old.

 

[allof fish]

Did you start with dry rock? Do you have any algae issues? Dry rock tends to absorb phosphate for awhile in a new tank. How many corals to do you have

 

[stevenVDB]

Some new cycles (7weeks) dry rock was added 2 months ago.
I have about 20 corals. Some SPS’s are showing STN

 

[allof fish]

Some new cycles (7weeks) dry rock was added 2 months ago.
I have about 20 corals. Some SPS’s are showing STN

What are your other parameters. What lights do you run and how big is tank. What does your bio load look like. 0 phosphate won’t necessarily cause stn in acros sometimes just dulls them out. Too much phosphate can inhibit growth

 

[Gumbies R Us]

I'm also curious to know more information about your tank

Photo of your tank?

What are you using to test?

 

[stevenVDB]

What are your other parameters. What lights do you run and how big is tank. What does your bio load look like. 0 phosphate won’t necessarily cause stn in acros sometimes just dulls them out. Too much phosphate can inhibit growth

Nitrate is at 18
These are the other
Tank is a Red Sea 425 g3 with 115 G2 LEDs

About 10 small fish. 4 doctors and a cleanup crew