Quote:
Originally Posted by Silver_Stang
why dose when you are doing weekly water changes? shouldn't that keep the levels in check?
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My tank is heavily stocked with coral and I have found my KH and Ca levels drop really quickly. KH especially quick. Mg not so much. I think I would shock the heck out of my corals with a sudden change every week if I relied only on water changes.
I use the weekly water changes for nutrient removal (cleaning up detritus and rocks) because I don't have a skimmer.