I just tested my alkalinty with Elos and Salifert 2 times each! Elos is giving me a dkh of 8.5 Salifert is giving me a dkh 9.6 who should I trust???:squigglemouth:
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i have used sailfert in the past but i found the only true thing i can trust is my corals fwiw they respond i respond they tell me when there happy.... sucks but that's the best way i have found.... i test one time when i initially set the tank up and go from my corals then on.... prolly not the best advice but after you have watched corals daily for years you learn these things...