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Then there isn't much need to dose for Ca and alk (which is what kalk does).
Kalk will increase levels of Ca and alk if there is no demand for it.
What are the current Ca and alk levels? Are you keeping corals?
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Pat
Current Tank Info: 125 in-wall , 40b sump. 6 bulb T5. ASM G2 skimmer. LPS and leathers
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