I used to dose the two part with the aqua medic reef doser.It was very cheap when you make your own additives.It was a joke cost wise.My ca and alk was always steady and I had more than 30 sps (alone) in my 150 along with lps and leathers and a few clams.It was very easy to adjust.I dosed kalk for low PH only.In a high dominated sps tank I found kalk never did much for ca addition.It just wasn't powerfull enough I only used it to control my ph
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