How is this possible?

[NanaReefer]

Both No3 & Po4 Salifert tests are reading undetectable? No coloring at all.

 

[1guydude]

Nitrate and phosphates?
As well as nitrite imo should b 0ppm or ppt...
If its undetectable. Than ur coral and algae are eating it up. Maybe feed a lil heavy next time if u want it actually detectable.
My .02
D

 

[NanaReefer]

Only algae I have is chaeto in my fuge. I feed Reef Frenzy 2x a day.

 

[1guydude]

I havent seen a white pic of ur tank lately. Could be that and the algae/bacteria on ur sand bed or the coralline/blue green algae on LR.

 

[NanaReefer]

Believe it or not I have no Coralline growth on my rock at all. Some on the back wall, overflow box and a little on the power head.

 

[Scooterman]

Nitrate and phosphates?
As well as nitrite imo should b 0ppm or ppt...
If its undetectable. Than ur coral and algae are eating it up. Maybe feed a lil heavy next time if u want it actually detectable.
My .02
D

There is no such thing as them eating it up and it completely vanishes, there will always be a trade off one for another. The only true method is through export (removal). You have to test the particulates (solids) in the water column also to tell really where your at, (this isn't easily done). Things like DSB and filtration only capture & hold it but it will accumulate and need cleaning eventually. From time to time these test kits can go bad and are dated and can also have bad batches. I'd try another test kit or bring in a sample for testing.

 

[spieszak]

Are the test kits new? Do you normally use those kits, or is it this the first time with that brand? When I get results that don't make sense, I generally blame myself, and check again. Usually my second test is normal or within range. If I do get results again that don't make sense , I figure I must need sleep and I try again the next day. It's on that third one I start to be concerned. With the small amount of water for testing and inaccuracies built in like measuring in 'drops', its pretty easy for something to go sideways.
I don't remember what the margin of error is on those tests, but its feasible that you could easily be within them at 0. Also, whatever that sand bed stuff is could have them all bound... I am truly puzzled by that stuff. Does it fade over night and come back over the course of the day? If so, maybe run your tests before lights on?

 

[NanaReefer]

Expiration on kits is 2017. Been using them for about 6 months. The "stuff" on the SB does seem to fade during lights out. But I'm not sure how much of the faded look is due to how it looks under different lighting.
But you're probably right in that whatever this "stuff" is its is eating up the Po4 & No3.