Randy Holmes-Farley
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My Tank Thread
Sounds like a good task for you Randy.I see an article. But Two Part should just be calcium chloride and baking soda and should be pure as possible. Don't see how trace elements would be in a "good" two part Recipe.
http://www.reefkeeping.com/issues/2006-02/rhf/
So where would one get trace elements in a pure two part system.
Even in a two part containing only sodium carbonate and calcium chloride, there will be other chemicals present. In my original recipe, the Dowflake provides lots of other chemicals, including quite a large amount of potassium (nearly an appropriately balancing amount, actually), as well as quite a few trace elements (although I've not tried to determine if they are actually added in more or less than balanced amounts, many certainly would be less, and some, such a bromide and lithium, might be more than a perfect balance would provide). The sodium carbonate and magnesium parts will also provide other elements as impurities. I've never tried to claim it was appropriately balanced for anything beyond the biggest concentration ions, however.
As an aside, a lot of people don't quite understand the two part concept, and this do not use it as intended. The magnesium part in my recipe, for example, is important to be added in a specific amount, not just because it provides the magnesium, but also the sulfate. Thus my recipe is approximately balanced for the ions sodium, chloride, sulfate, magnesium, potassium (when using Dowflake as I originally devised), and carbonate/bicarbonate. It is not intended to be balanced for trace elements, and I do not know which might be depelted and which might be added using a very simplistic recipe.
Also note that when I saw approximately balanced, that is all any product can do, either a two part or balling, because exactly what is taken up along with the calcium and alkalinity will vary depending on what is consuming it. Some corals use a lot higher proportion of magnesium relative to calcium for example, and so the specific demands will vary tank to tank. So one should not be too precise in exactly what is balanced and what is not.
I see an article. But Two Part should just be calcium chloride and baking soda and should be pure as possible. Don't see how trace elements would be in a "good" two part Recipe.

