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Old 05-13-2008, 11:38 AM   #1
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Raising Calcium

Hey guys.

I did a 25 % water change and checked my calcium and everything after.

Phosphate was good,

Alk was good - like 3.75-4.0

Calcium was around 300 only though.

I bought A B 2 part calcium thing but it says it will raise alk as well as calcium. I didn't think I wanted to raise alk though, so i just added purple up as it says it is liquid calcium and some kind of liquid aragonite and didnt mention alk at all.

I will check again today to see what the purple did - i was wondering what you guys would do in this case with alk of about 4 and very low calcium??
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Old 05-13-2008, 12:48 PM   #2
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Purple Up is virtually useless. You can use just the Ca part, but your Alk will eventually decline. I would dose the Ca and see what it does to the consumption rate and use kalkwasser to maintain those levels. Of course, there is always baking soda (Alk), pickling lime (Ca, Alk, pH), etc. You can start here:

Chemistry and the Aquarium
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Old 05-13-2008, 01:07 PM   #3
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innovator - do you have experience with the 2 part A B calcium/alk "c balance"?

can i just use one part and not the other? I am confused as to what to do? also why is purple up useless?
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Old 05-13-2008, 01:09 PM   #4
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good article by the way, thanks ill pore over this later.
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Old 05-13-2008, 01:35 PM   #5
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Yes you can use just one part of the two part solutions. You can also check out BulkReefSupply for makingn your own 2-part (3-part really) solutions.
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Old 05-13-2008, 01:46 PM   #6
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Quote:
Originally Posted by mandown123 View Post
can i just use one part and not the other? I am confused as to what to do? also why is purple up useless?
Yes, you can just use the ca part now to raise your ca and get your levels in balance. Once they are balanced, you should use equal parts of both to maintain that balance.
PurpleUp is virtually useless because for the price you pay, it will not significantlly raise your ca level. It also contains ground up aragonite...basically sand, and that doesn't dissolve.

What salt are you using that your ca is so low?
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Old 05-13-2008, 01:54 PM   #7
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C-Balance works just as any 2-part system should, imo. You can use one without the other, but there is a compromise eventually. Here is a handy-dandy tool: Reef Chemistry Calculator

Purple Up is nothing more than calcium chloride and aragonite (calcium carbonate). The aragonite does not and will not dissolve in seawater and the CaCl2 acts as nothing more than a "shot," if you're even lucky enough to get that. The bottle isn't even large enough to fill your trash can
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Old 05-13-2008, 01:58 PM   #8
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The article Innovator linked is one of the core articles I reference regularly for CA/Alk questions. Be sure you also look at another article in the set (it's linked in the intro of the article from Innovator) that addresses specifically adjusting those levels and their relation to pH.

Chemistry and the Aquarium - Solving Calcium and Alkalinity Problems

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Old 05-13-2008, 03:47 PM   #9
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I think everyone has pretty much covered it. I agree about stopping the purple up. Also like Innovator said your Alk will eventually drop.

What salt mix are you using?
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Old 05-13-2008, 03:50 PM   #10
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i'm using reef crystals, i heard it was pretty good. i have a lot of coralline covered rocks which probably suck a lot of the ca out. theyre hungry for it. i need to get my ca up... so i guess i can and will dose one half of the solution and see how that goes.

i guess i should just throw purple up in the trash?

i have resolved to do more water changes, as i slacked a little before this latest change so thats probably how to ca got so low.
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