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Unread 10/04/2007, 08:58 AM   #1
Caliloaner
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how should I dose calcium

The alk in my tank is high and my calcium a little low... about 360-380 for calcium... I have a calcium suppliment but haven't added any yet. It's Kent calcium...


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Unread 10/04/2007, 09:08 AM   #2
kuoka
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Kent Calcium is fine. You can also dose by adding kalk with your fresh water.


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Unread 10/04/2007, 09:11 AM   #3
Caliloaner
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sooo do you just poor it right in or what? Any special way to dose it?


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Unread 10/04/2007, 09:15 AM   #4
kuoka
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Follow the instructions. I haven't used Kent before but I've used others. Dilute it with fresh water (RO) and add it to your tank or sump. It will take time to slowly raise your Calc levels.


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Unread 10/04/2007, 09:21 AM   #5
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It is usually best to add it in the water you use for topoff. That dilutes it somewhat and avoids problems with precipitation. KW is not good to use in a tank that already has high alkalinity as it adds more. The calcium chloride based supplements supply calcium but not alkalinity.


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Unread 10/04/2007, 09:26 AM   #6
Caliloaner
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what is KW?


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Unread 10/04/2007, 09:48 AM   #7
Caliloaner
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I also heard that calcium and alk are related as when you add calcium in usually lowers your alk and vise versa... but I don't want to lower the alk too much and set off the PH.


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Unread 10/04/2007, 09:55 AM   #8
crumbletop
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In your system with self reported "high alk", don't dose kalkwasser to get the calcium up. KW is kalkwasser. Kalkwasser is balance calcium and alkalinity and will serve to raise your alkalinity an equal amount with whatever calcium it adds. Not what you want in your situation. Also, Kalkwasser is not very good for raising levels -- it's better for maintenance of a Ca and Alk once you get it where you want it.

Also, FWIW, 380 is just fine for Ca.

Dose the calcium to a high flow area of the sump / tank using this calculator:

http://jdieck1.home.comcast.net/chemcalc.html

Also, here is a good article on calcium and alkalinity supplementation schemes:

http://www.advancedaquarist.com/issues/feb2003/chem.htm


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Unread 10/04/2007, 11:46 AM   #9
dwd5813
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Quote:
Originally posted by Caliloaner
what is KW?
KW=Kalkwasser (sp?) or limewater.
http://www.reefkeeping.com/issues/20...hf/index.php#4


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Unread 10/04/2007, 11:53 AM   #10
cobra2326
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Quote:
Originally posted by WaterKeeper
It is usually best to add it in the water you use for topoff. That dilutes it somewhat and avoids problems with precipitation. KW is not good to use in a tank that already has high alkalinity as it adds more. The calcium chloride based supplements supply calcium but not alkalinity.
I was wondering when someone was going to chime in and let him know not to dose kalk when it's unbalanced. See this article:
http://www.advancedaquarist.com/issues/nov2002/chem.htm


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Unread 10/04/2007, 07:20 PM   #11
stemonia
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Why not use a calcium reactor as opposed to dripping Kalk? I know dripping Kalk is less expensive than putting in a reactor but does dripped Kalk provide anything that a calcium reactor does not?


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Unread 10/04/2007, 07:38 PM   #12
mg426
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IMO the VERY first thing you need to do is get your tank in the proper balance. Use the calculator that is provided above and do some reading. Once your tank is balanced then choose the method of maintaining it.


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Unread 10/05/2007, 09:04 AM   #13
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Just to set the record straight. Alkalinity is the sum of bicarbonate, carbonate, hydroxide and few other minor components (borate for example). KW is calcium hydroxide and therefore is an alkalinity source. It doesn't remain a hydroxide for very long when dosed correctly but is converted to carbonates and bicarbonates when reacted with carbon dioxide produced in the tank. Of course, both of these are a form of alkalinity and unwanted in a tank high in that component.


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