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#1
04-13-2009, 05:14 AM
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I have not tested my new makeup water for Mg yet, but I have been using RBS also for about 4 months. I took a leap of faith and didn't test levels - which was a mistake. (I always test Ca and Alk every week, so Mg falls off my radar easily - because otherwise for multiple tanks I sit there and test for an hour which .. well, it's not a good excuse, but it is my excuse).
Anyhow. Mg among 3 reef tanks was all in the 900-1000 range when I started testing Mg again. So I don't know what I'll find when I go to test my makeup water, but I'm not expecting to find it's very high. I'll post back #'s if I do get around to testing a new batch of SW makeup water.. Now I'm catching up on all the Mg tests I didn't do because I'm testing every day whilst I try to raise Mg back to seawater levels .. ugh! Lesson learned, don't slip on testing if it's a parameter that's important to you. 
__________________
-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee! 
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#2
04-13-2009, 11:02 AM
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Quote:
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#3
04-13-2009, 03:26 PM
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Found this interesting comparison of salt mixtures. I will make-up a pail of RDS salt today for testing and let you know what my results are.
http://www.ultimatereef.net/forums/s...d.php?t=246450
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#4
04-13-2009, 03:42 PM
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Quote:
Steve
__________________
 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive.
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#5
04-13-2009, 05:26 PM
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If you want accurate readings for testing salt you have to either mix up the whole box or record multiple tests from multiple samples and use stats, testing a cup here and there will always give different results. This means the results in the link are pretty useless since the guy only mixed up 500ml samples. I've been using RBS on my tank and others for quite some time and Mag levels have never been a problem so I'm sure it's fine.
Last edited by sphelps; 04-13-2009 at 05:30 PM.
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#6
04-13-2009, 06:05 PM
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But, Sphelps, you don't rely on the salt mix and waterchanges to maintain Mg, do you? I would have guessed you were manually dosing Mg anyhow.
__________________
-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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#7
04-14-2009, 04:12 AM
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Just calculated that i need 900grams of Mg to get my tank from 1000 to 1300ppm.
Well its sort of makes sence because ZEO sells Magnesium in small rocks and they recomend them in Calc reactor media about 30% of calc media volume to keep up the Mg levels. So i guess my next salt will be a D-D ocean pro.
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