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Old 03-09-2010, 03:17 PM   #1
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How can I get my Calcium levels where they need to be?

Hi everyone. I am having trouble getting my calcium level above 360-380. My PH is 7.8-8.0, Nitrate 0, nitrite 0, ammonia 0, phosphate 0, carbonate hardness 11. I have added Kent marine 2 part calcium supplement daily and also the probuffer my kent marine. That did not get it above 380. I tried, on my last PWC, Caribsea, RO re-mineralizer Aragamite. I use RO/DI water and only have a condy anemone i just added, and live rock with a couple of sea rods. I don't have corals where it would be using an abundant amount of calcium. Does anyone have any ideas on why I can't get my calcium level over 400? I would like to get in in the 420-450 range so I can add some corals. Thanks.
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Old 03-09-2010, 04:24 PM   #2
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380 is fine. Corals won't grow any better at 420 or 450 than they will at 380. You just need to be in the range of 380 - 450 calcium, 7-11 dKH alk , and 1250-1350 mag.
Reef Aquarium Water Parameters by Randy Holmes-Farley - Reefkeeping.com
What's your magnesium?
Don't add anymore buffer. Your alk is on the high side already at 11 dKH.
What brand salt are you using?
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Old 03-09-2010, 05:02 PM   #3
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Instant Ocean Sea Salt. I don't test for magnesium because the test kit is $30 in my area. I just add the aragamite to my RO/DI water.
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Old 03-09-2010, 06:13 PM   #4
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I agree with Larry that your calcium is fine where it is. PWC`s should replenish all your trace elements needed.
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Old 03-09-2010, 06:42 PM   #5
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I was also going to ask what your Mg level is.

How heavily stocked is your tank in terms of corals?
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Old 03-10-2010, 01:27 AM   #6
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I only have live rock, a couple of sea rods, a condy anemone right now. I just want to get my parameters right so I can add some corals. Shouldn't my caclium level be higher than 360 when I do a water change?
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Old 03-10-2010, 02:40 AM   #7
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I agree that your calcium is not that low, but I understand why you would like to raise it up a little before you get into stony corals. If I were you I would get Coralife Saltmix for you next few water changes, that stuff is a bit high in CA and cheap. You should be able to pick up a single bag of it for around $15. Then you will be able to get closer to 420ppm and you can stop dosing the calcium supplement until you have lots of stony coral. If you plan on keeping coral, you will need to break down and spend the $30 on a Salifert or Elos Mg kit. If your mag is too low then that will inhibit you from rasing the Ca in your tank.
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