I've never tested the Ca value of the effluent, just the pH and the alkalinity. I think you only need to track either one of those (pick your favourite). It will add to the tank with the numbers balanced to each other. My tank has Ca hovering around 400ppm and alkalinity with 4.0meq/l with the reactor running effluent at 60 ml/min. Hope this helps!
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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