03-30-2010, 07:09 AM
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Originally Posted by Kellsindell
I keep my alkalinity around the amount you currently have. About 8-9dkh. From some research i have read from known chemist like Rand-Holmes Farley, it keeps it far more stable that those #'s. Just make sure you have your Ca and Mg in the correct amounts and you're good. I keep a full SPS reef with some softies and because you don't have any major alk and Ca consuming corals, i wouldn't worry too much about it. Yes, check them on occasion and bring alk and Ca together to correct it as needed, but not one at a time. The 3 play an important role together. Think of it as the Holy Trinity of saltwater. Mg, Alk, and Ca, the go hand in hand and if you change one, it affects the other and we'll call you the ph. If you add them equally then the ph is good, but if you only add one or the other, then it can greatly affect your ph. lol, that's a horrible metaphor, but i hope it helps someone else. (sorry
Great advice. I follow the same concepts in a very similar system. I personally do not test for magnesium, but I agree in principle with the concept. If you have difficulty maintaining calcium levels, despite the alkalinity not dropping, then this could be a sign needing to adjust magnesium. I personally correct this with a series of water changes, but testing and dosing magnesium works well also.
It is very important to recognize what Kells is saying here about calcium. You can not adjust alkalinity correctly without knowing the calcium levels. At minimum make sure you are testing both and adjusting both. More on this here: http://www.tropicalfishkeeping.com/m...-marine-33079/