Why not shut the reactor off and have your sitter dose some Ca and alk manualy? I have mine just dump some in in a pre measured amount. It might not be perfect but at least it will keep your levels up.
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150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller
180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
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