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Old 03-02-2006, 09:42 PM   #1
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CA and Alk

I have a 30 gallon tank with a fair amount of sps corals.
I am having trouble keeping my Ca and Alk at high enough levels.
I get my Ca up to 400 and my alk up to 9dkh using liquid CA and Coral builder. I dose kent two part daily about 15 ml per of each. My Ca within two days drops to 320 and my Alk drops to 6. Should i increase the daily 2 part The bottle says to use one 10ml per day per 40 gallons i am already over this.
Any suggestions???

Thanks
Richard
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Old 03-03-2006, 10:38 AM   #2
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Sounds to me like your Ca/Alk demand in the tank is high due to the number of SPS corals. This is normal.

Do you use Kalk as your topoff water? If not, I would definatly advise you start doing this as it will help keep those Ca/Alk levels high.
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Old 03-04-2006, 10:49 AM   #3
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There is a recommendation on wetwebmedia for using a kalkwasser "slurry" as one form of dosing kalkwasser, which I happen to like also. I found it very helpful for the Ca and Alk.
Recently I changed salt from IO to Coralife and now my Ca and Alk are much higher without the addition of kalk.
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Old 03-05-2006, 12:18 AM   #4
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You are most likely suffering from a sag in mg levels. Please check your mg to make sure its 3 times your ca level. Preferably 1300 - 1350ppm. A sag in mg levels results in difficulty maint ca and alk levels.

Peace.
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Old 03-05-2006, 02:56 PM   #5
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mg levels were 1375. I think the coral is just consuming more and more calcium. i am going to try to raise to 420 and increase the two part!!!
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Old 03-05-2006, 06:16 PM   #6
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I second the kalk drip. I had the same problem till I did this, and I still have to stay on top of it.
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