I recently purchased the HI713 checker for phosphates; I had been using Red Sea for 2 years prior.
My hanna results are showing .83 - .86 ppm
Red Sea shows .10 - .12
I repeated the hanna test 3 times, red sea twice using identical batch of tank water. Can someone please help me understand this huge discrepancy in results? :hmm3:
My hanna results are showing .83 - .86 ppm
Red Sea shows .10 - .12
I repeated the hanna test 3 times, red sea twice using identical batch of tank water. Can someone please help me understand this huge discrepancy in results? :hmm3: