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Old 11-22-2011, 09:29 PM   #1
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Calcium concerns!!

So in the last two months I've watched my calcium level fall like crazy. It's gone from 440 to now 280. My LFS said to do a 50% water change this week then a 50% next week. Then go back to my normal 10% the following week. So I did the 50 last week and checked today and it's still at 280ppm.
I was told that the reason my calcium level dropped so much was that the magnesium level was depleted in my tank. I do dose with B-Ionic daily. But two months ago was using purple up. So once again my LFS. Told me to increase the calcium dose by double, yet it has not helped. Any suggestions to what may be going on or how to raise my calcium. Thanks
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Old 11-23-2011, 01:46 AM   #2
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Try dosing with kalk via your ATO it keeps your levels stable without spiking your ph and it replinishes your calcium slowly but constantly as evaporation from your tank is replenished with water dosed with kalk. I add 3 teaspoons of kalk to my 5 gallon container of water for my 76 gal. Just make sure to mix kalk by giving your container a good swirl as you fill it with water and let sit for a few hours before you use it for your ATO. Make sure your hose line of your ATO does not sit at the bottom of the container where the the undissolved powder settles. only the saturated solution of calcium hydroxide that sits right above this undissolved powder is what is beneficial to your tank .
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Old 11-23-2011, 07:23 AM   #3
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What brand salt are you using? If you did a 50% water change and your calcium level didn't increase, I would say you have a bad calcium test kit.
What is your alk and mag levels at?
What brand test kits are you using?
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Old 11-23-2011, 09:22 AM   #4
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Instant ocean and alkalinity at 160ppm. Not sure about mag cause I don't have a test for that.
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Old 11-23-2011, 10:45 AM   #5
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I agree that the kit may be bad, have you had your LFS confirm the Ca, Mg & Alk levels?

Kalk is great in ATO, keeps my Ca at 500 or so. Stabilizes alkalinity & even precipitates out Phosphates. The only downside I noticed was that my Mg levels dropped quite a bit, so now I'm dosing Mg as well.
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Old 11-23-2011, 12:12 PM   #6
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I bought a new test kit and it said the same thing. I also had it tested at my LFS and there's said 290.
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Old 11-23-2011, 12:13 PM   #7
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And I don't have an ATO. Wish I did.
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Old 11-23-2011, 12:43 PM   #8
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Neither do I, I use a gravity drip system.

I measured the daily evap & did some math to figure out the drip rate. It's not an exact science, but works for now.
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Old 11-23-2011, 12:46 PM   #9
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It takes some patience, tuning & caution, but its been working well. Keeps Ca & alk up all the time, along with SG and keeps water level constant for my skimmer. Cost about 10$ for airline tubing, valve & 2 gallon drip container.
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Old 11-23-2011, 01:07 PM   #10
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How many hard corals do you have in your tank? Maybe think about getting a calcium reactor? Also where is your alkalinity levels? I know that can affect calcium.
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