03-29-2010, 12:55 AM
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What to dose when you don't do waterchanges, for those with SW tanks also....
Many folks ask if anything needs to be dosed, if they stop doing water changes. If a reef tank, you'll certainly need to dose Calcium and Alkalinity. Then some Magnesium when needed. And maybe Strontium. The easiest way to dose Cal and Alk is by mixing some powdered lime with your topoff water. For details, search for "kalkwasser dripping". The powder is cheap from here: http://store.mrswagesstore.com/mrswagpiclim.html
Everything else is supplied by the food you feed, and by the organics from the scrubber. This includes all the trace elements that you always hear about. Remember that in the ocean, 90% of all life (besides bacteria) is algae. Algae provides all the food for everything that lives in the ocean, by coverting the sun into organics. And included in these organics are the trace elements that your tank needs too. Cal and Alk, however, are inorganic, and are used up quickly by corals and coralline, so you need to dose them often or continuously. Mag is dosed when your test says to. And the same with Strontium.