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#1
01-28-2009, 02:14 AM
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You're welcome.
 If I remember correctly the smallest jar of the Seachem Reef Advantage Magnesium costs about $8 or 9, and it lasts quite a long time as magnesium isn't used up very quickly, and most salts have adequate levels, so most people need to only dose very little if they do regular waterchanges. Oh, and you should never, ever, ever (did I say never?) dose for something unless you test for it.  
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#2
01-28-2009, 02:48 AM
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Calcium Chloride, Baked Baking Powder and epsom salts. I have each mixed with RO/DI in old pop bottles and add a bit once a week during the water change.
Cheap and effective. 
__________________
- Greg 90G : Light - Tek 6xT5 | Skim - EuroReef RS135 | Flow - 2xVortech MP40W | Control - Reef Keeper 2
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#3
01-28-2009, 02:53 AM
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DIY Calcium, Magnesium and Alkalinity Additives
I use the DIY two part additives detailed in this link. It is very inexpensive and effective. I found commercial preparations very expensive to use.
http://reefkeeping.com/issues/2006-02/rhf/index.php This link helps determine how much of these additives to use, based on tank volume. Select Randy's Recipe as your additive. http://home.comcast.net/~jdieck1/chemcalc.html Hope this helps!
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