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Old 01/09/2008, 09:20 AM   #1
kaserpick
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Kalk and Alk?

Hey guys, I have a 30g modified breeder tank. There are about 30 corals consisting of mainly SPS and zoanthids. I have around 15 SPS (mainly frags), 2 Clams (Crocea and Maxima both around 4-5"), and 1 Plate coral; the rest are zoas.

Have a few questions:
1. Will Kalkwasser affect Alkalinity (raise or lower)?
2. Will Kalkwasser maintain Mg as well as Ca?
3. I'm adding around 1tsp Ca and 1/3 tsp Mg everyday with no ill effects (both are powder by Tropic Marin). Do I still keep adding as much while using Kalkwasser?
4. If I use Kalkwasser, then is using it in top-off at the minimum dosage everyday too much?

I do weekly 7 gallon water changes; my Alk is 9.6-10.0 dKH, and my Calc is 390-400ppm (fluctuation depends on how long in the week it is for both) and Mg is around 1150 now (I'm slowly raising it until I am in the upper 1200's). I use Salifert test kits for all three.


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Old 01/09/2008, 09:26 AM   #2
kaserpick
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Also, if Alkalinity is too high, is there a safe way to lower it besides WC's? Thanks!


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Old 01/09/2008, 10:01 AM   #3
Randy Holmes-Farley
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Limewater supplements both calcium and alkalinity. Depending on how much you add and the demand, there my be no need for additional calcium or alkalinity. I use it for all top off.

Limewater adds no magnesium.

How high is alkalinity? Normally waiting is the best way to allow it to drop, unless it is super high.


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Old 01/09/2008, 08:18 PM   #4
kaserpick
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Sounds good; thanks Randy. Alkalinity is about 9.8 dKH.


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Old 01/10/2008, 06:00 AM   #5
Randy Holmes-Farley
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You're welcome. That alk sounds perfect.

Good luck.


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Old 01/10/2008, 07:55 AM   #6
kaserpick
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Thanks again; everything seems to be growing well. It's the first time I've ever tried SPS, and to be honest, when I had my softies and LPS tank, I just did weekly water changes and hardly checked anything (probably a bad idea but it worked).


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