Myka's 69 SPS Tank 2015 - Page 9

duncangweller · #1 08-16-2015, 01:46 AM

I'm a big fan of those barnacle blennies after seeing them in seabreeze's tank. They are a lot of fun to watch

Wheelman76 · #2 09-16-2015, 02:07 AM

Quote:

Originally Posted by Myka

I finally got a reading on the Hanna ULR Phosphorus checker! 6 ppb (0.006 ppm)! Yay.

That actually translates to 0.018

The conversion from phosphorus to phosphate for that ULR checker is

3.066 x 6 divided by 1000 = 0.018

Rice Reef · #3 09-16-2015, 02:16 AM

Quote:

Originally Posted by Wheelman76

That actually translates to 0.018

The conversion from phosphorus to phosphate for that ULR checker is

3.066 x 6 divided by 1000 = 0.018

Jess is right and faster than my splendid abacus

Myka · #4 09-16-2015, 02:37 AM

Well that's what I thought too, but RHF recently said that the checkers actually both check phosphate, and that Hanna just calls the ULR "phosphorus" to make it easier to differentiate. I'm going to have to go find that comment from him...oh boy this might take awhile.

Myka · #5 09-16-2015, 02:40 AM

Ok, actually that ended up being really simple...however, I didn't really continue reading beyond that part where he goes into the math of it. Thanks for the correction guys! It looks like I am right around the accuracy level of the checker, so I still just have a tiny "sniff", but at least I have something!

Quote:

Originally Posted by Randy Holmes-Farley

Both checkers check only the inorganic phosphate in the tank. Despite the name, the phosphorus checker does not actually detect phosphorus. The name, and the units it reads in, is just a marketing distinction.

The Hi736 Phosphorus checker does have a somewhat better accuracy, so that would be the one to pick for most reef applications.

You do need to multiply the reading by 0.0032 to get ppm phosphate. So 5 ppb = 0.016 ppm.

Note to that the values have a stated uncertainty of 5 ppb phosphorus (0.016 ppm phosphate), so 000 ppb could really be any value up to 0.016 ppm phosphate.