Mail order source for pure dolimite

[TexasTodd]

Does anyone have a good mail order source for pure dolimite? I want the stuff that can be mixed with your CA ARM reactor media to boost magnesium levels.

My LFS's don't carry it.

Todd

[SeanT]

I use this.
Sixth product down.
http://www.captiveoceans.com/products-nonzeosupplements.html

[Boomer]

I would use what Sean posted or go here if you like, for real pure dolomite.

http://www.imascominerals.com/

[TexasTodd]

Thanks Boomer and Sean.

[SeanT]

You are welcome.

FWIW, the Magnesium supplement I have looks exactly like the Dolomite on the website Boomer provided.
I know that is far from scientific by any means but it is a good sign lol.

[Randy Holmes-Farley]

CA ARM reactor media to boost magnesium levels.

Just be careful to not expect it to significantly raise magnesium levels. It is fine for maintaining them, but isn't appropriate for a big raise in levels.

From this article:

Magnesium in Reef Aquaria
http://www.advancedaquarist.com/issues/oct2003/chem.htm

"It has been suggested that adding dolomite to CaCO3/CO2 reactors can help with magnesium problems. Dolomite is a material that contains both magnesium and calcium carbonate. If dolomite is being added to the reactor to maintain existing appropriate magnesium levels against the continual depletion via calcification (for example, if the calcium carbonate being used is too low in magnesium to maintain adequate magnesium) then this is a fine approach.

However, this method is unsuitable if the goal is to raise magnesium levels. The problem is that for every magnesium ion released from the dolomite, 2 units of alkalinity are also released:

MgCO3 ---> Mg++ + CO3--

Consequently, if one wants to raise magnesium by 100 ppm, the alkalinity will necessarily rise by 8.2 meq/L (23 dKH). The only way around this problem is to add a mineral acid (not vinegar) to the aquarium to reduce the alkalinity, and that may be more problematic than just adding magnesium in the first place."