Z
ZAX
Guest
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....