A few weeks ago, I purchased a Hanna HI774 Phosphate ULR. Last night, I used my last reagent that came with the Hanna. My PO4 has been consistently testing 0.37 for the past week. It was up to 0.50 2.5 weeks ago and I been trying to bring that down with Seachem Phosguard. I last refilled the Phosguard 4 days ago and was about to refill it again since Phosguard exhausts quickly. Today I used a reagent thats part of a new pack. My PO4 tested 0.02. what the heck. I suspected something was wrong because I am getting a bit of dino on the sandbed and my well established Walt Disney acro started to STN.
My hypothesis is that the original reagents that came with my Hanna was a bad batch that tested consistently high? And with me using Seachem Phosguard, I have now drove PO4 way down. My tank likes to run dirty and the sweet spot is 0.10. Or is the new batch of reagent bad? Argh. I am so mad....I thought Hanna was the best and most accurate. I did the test twice tonight. 0.02 and the 0.03.
My hypothesis is that the original reagents that came with my Hanna was a bad batch that tested consistently high? And with me using Seachem Phosguard, I have now drove PO4 way down. My tank likes to run dirty and the sweet spot is 0.10. Or is the new batch of reagent bad? Argh. I am so mad....I thought Hanna was the best and most accurate. I did the test twice tonight. 0.02 and the 0.03.