Curious, does anyone use this device?
I test every Sunday, and have steadily seen my PO4 dwindle since starting GFO on my system a month ago, but I can't quite figure out this device. I also am testing with a Red Sea Pro kit, and a Hanna PO4 checker. I've always been skepitcal of the ULR phosphorus checker, it's never really been close. 2 tests each:
Last week, the ULR last week was 37 Phos = .11 PO4. Which was slightly lower than the other 2, at .16 and .21 respectively.
I saw little reduction in PO4 overall in that 7 days so I swapped in a fresh batch of GFO.
This week:
PO4 Checker: .04 and .07
Red Sea kit: .04-.08 (Color is right between it..)
(BTW, both these values have gone down every week as you would expect with swapping in fresh GFO)
Phos ULR = 79 and 72 which is about .2 PO4 - it went up almost .1 PO4.
I have reason to believe that the ULR Phosphorus checker does not work correctly, as the other 2 have remained consistent as to what you would expect when starting GFO. The other has always been questionable to me, which is why I test with 2 other methods.
Not sure what to do here. Is there a trick to this thing I'm missing? Should I contact Hanna? New reagent? I'm lost..
I test every Sunday, and have steadily seen my PO4 dwindle since starting GFO on my system a month ago, but I can't quite figure out this device. I also am testing with a Red Sea Pro kit, and a Hanna PO4 checker. I've always been skepitcal of the ULR phosphorus checker, it's never really been close. 2 tests each:
Last week, the ULR last week was 37 Phos = .11 PO4. Which was slightly lower than the other 2, at .16 and .21 respectively.
I saw little reduction in PO4 overall in that 7 days so I swapped in a fresh batch of GFO.
This week:
PO4 Checker: .04 and .07
Red Sea kit: .04-.08 (Color is right between it..)
(BTW, both these values have gone down every week as you would expect with swapping in fresh GFO)
Phos ULR = 79 and 72 which is about .2 PO4 - it went up almost .1 PO4.
I have reason to believe that the ULR Phosphorus checker does not work correctly, as the other 2 have remained consistent as to what you would expect when starting GFO. The other has always been questionable to me, which is why I test with 2 other methods.
Not sure what to do here. Is there a trick to this thing I'm missing? Should I contact Hanna? New reagent? I'm lost..