Getting 0 on my ulr phosphorus checker

[Tommy's Reef]

Is this possible, I run gfo, water changes, have a good skimmer a refugium. No algae really.
Is there a way to test it I have 2 different batch solutions with different dates.
Has anyone else had this?
Am I running with no phosphates?

 

[Mindi]

often get zero...mostly in fact

 

[rob safron]

I Run run zero most of the time. Your using GFO. If you don’t want 0 maybe try less GFO.

 

[Tommy's Reef]

Yall get 0. Wene testing with ultra low range phosphorus Hanna checker?
How does your reef survive?

 

[Mindi]

By using Phosphate as it becomes available before the testing process can see it...you are really testing residual phosphate not ALL phosphate. Some significant amount gets consumed before the tests see it.

 

[Hanna Instruments]

Is this possible, I run gfo, water changes, have a good skimmer a refugium. No algae really.
Is there a way to test it I have 2 different batch solutions with different dates.
Has anyone else had this?
Am I running with no phosphates?

All scientific instrumentation have accuracy statement as well. Our HI736 ULR Phosphorus Checker has an accuracy statement of ±5 ppb ±5% of reading, this means your phosphate level can be as high as 5ppb or 0.015ppm.

 

[Tommy's Reef]

All scientific instrumentation have accuracy statement as well. Our HI736 ULR Phosphorus Checker has an accuracy statement of ±5 ppb ±5% of reading, this means your phosphate level can be as high as 5ppb or 0.015ppm.

OK cool. What would be yalls idea of a good number to be at?

 

[rob safron]

A safe number is 0.02 phosphate.