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#1
03-15-2016, 06:45 PM
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KH and magnesium
New to saltwater. Been freshwater all my life.
Loving this new adventure so far! I just have 2 problems...KH and magnesium levels! KH constantly stays high and magnesium constantly stays low. What can I do? Here's some background info... 15g tank that never went through a cycle. Used cured live rock. Tank has been running for a month Instant ocean salt with distilled water A few zoa polyps Small war coral Hammer coral A couple small mushrooms Salinity 1.026 Calcium 420 Magnesium 1150 Alkalinity 3.42 KH 9.6 PH 8.4 The above levels are always constant. Even after 2 gallon water changes every week I dose 5ml mg daily to try and get levels up Any help greatly appreciated! Thanks 
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#2
03-15-2016, 06:53 PM
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Add magnesium? Eventually Alk will come down on its own. Go to the reef chemistry section and read through those threads, Christy has some good stuff in there.
This will help you figure out what you need to add: http://reef.diesyst.com/chemcalc/chemcalc.html Last edited by soapy; 03-15-2016 at 07:05 PM.
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#3
03-15-2016, 10:30 PM
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According to this:
http://www.bulkreefsupply.com/reef-calculator Using Randy's recipe for magnesium you'll need about 242 ml of solution to get your Mg up to 1350 (ish). Many salts have low Mg in the 1100 range so water changes can work against you if you're trying for a higher concentration. Doing water changes with a reef salt that's high in Mg might be less expensive than buying retail Mg supplements to increase levels. Just a thought. Cheers
__________________
_________________________________________ 20 year old Hagen 100g 6' mixed reef. 36g sump with multiple broken Waveline products removed. Lights T5-LED combo. 1 Coral Beauty, 1 Flame, 1 Blue Tang, 5 Green Chromis, 2 Pajama Cardinals, Asst'd hermits & snails. 2 large boxes of broken expensive aquarium crap. 1 x VERY understanding wife.
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#5
03-16-2016, 04:47 AM
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Quote:
See article http://www.advancedaquarist.com/2003/10/chemistry
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#6
03-22-2016, 10:30 PM
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If you can get your magnesium to a level you want, check your salt mix level of magnesium before doing a water change and top it up to the same as your tank so the level stays the same in your tank. You are just not dosing enough to bring up the levels you need to.
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