I just completed testing for P04 with the following results.
Salifert - 0.01
Red sea Pro - 0.09
Hanna ULR - .18
Hanna LR .15
All I can say about these kits is, well, what the heck. I had started using the Salifert kits about six weeks ago because they were fast and easy. Over the last week I noticed my sps looking a tad pale, tested P04 and decided it was time to dose a little NeoPhos. After having a hard time getting to .03, last night I used twice what I was using and thought it best to test aging this evening before double dosing again. Salifert reported .01 and that just didn't seem possible so out came the Hanna ULR kit. It reporting 0.18 certainty didn't seem possible and so I cross checked it with the Hanna LR coming in at .15. At that point I pulled out the RedSea Pro kit for a confusing and maddening .09. Sigh....
Which kit would you trust? I'm inclined to trust the Hanna kits. And yes, none of the kits are near their expiration dates.
Salifert - 0.01
Red sea Pro - 0.09
Hanna ULR - .18
Hanna LR .15
All I can say about these kits is, well, what the heck. I had started using the Salifert kits about six weeks ago because they were fast and easy. Over the last week I noticed my sps looking a tad pale, tested P04 and decided it was time to dose a little NeoPhos. After having a hard time getting to .03, last night I used twice what I was using and thought it best to test aging this evening before double dosing again. Salifert reported .01 and that just didn't seem possible so out came the Hanna ULR kit. It reporting 0.18 certainty didn't seem possible and so I cross checked it with the Hanna LR coming in at .15. At that point I pulled out the RedSea Pro kit for a confusing and maddening .09. Sigh....
Which kit would you trust? I'm inclined to trust the Hanna kits. And yes, none of the kits are near their expiration dates.