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calcium reactor. dosing

  1. General Reef Discussion
    I am trying to get my calcium reactor dialed in. I have a 220 tank with 260 pounds of rock. The rock has a ton of purple algae. Week ago calcium was 400. Yesterday it was 360 I did a 35 gallon water change it is now 380. How do I get calcium up to 440 and maintain it at 440 with calcium reactor...