calcium levels dropped

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ZAX

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calcium levels was good then it dropped to 340. Added calcium and retest the next day and still 340. Recently changed to RO water from tap water, not sure if this would affect calcium or not. Only running a protein skimmer in tank, no other fancy gagets, and have a bunch of corals and 3 fish. Added another 15 ml calcium today. Does it take a few doses to get numbers back up? Should I be doing something different, still learning the hobby....
 
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shayneh

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Did you recently change salt or start a new bucket? Instant Ocean is horrible for calcium and magnesium levels.... I have sometimes added 4 large tablespoons to a 5g bucket just to get ca up to 390-400.
 
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ZAX

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Rick is going to test my test kit tomorrow....didn't change pails of salt or anything....still on the same batch for the last month or so...
 
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