So today I've got my Hanna PO3 checker and I am getting 0.03ppm which aligned to Denny's result. I used another Ca test Red Sea and I am getting 410ppm. Mine was showing 450ppm Should I start dosing a little bit Ca or keep testing couple of more days to confirm Ca is dropping? Alk dropped to 8.4, PH range 7.9-8.2.
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