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Old 08-02-2005, 05:39 PM   #1
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Causes of low cal.

Can not get my cal. up used a 8 onz.bottle of concentrated cal. and nothing. What can be the cause of tiis, in a week I have gone frome 260 to 300 to 400 to 300 the next day. what is this, need help fast.
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Old 08-02-2005, 06:25 PM   #2
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perhaps your test kit is inaccurate. Take a sample to the LFS and see what reading they get. CAL should drop that much in a days time. Coral consume calcium over time, but not overnight.
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Old 08-02-2005, 06:44 PM   #3
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Check your test kit it might have expired. What test kit are you using? Also what were you using to supplement? There are some cheap stuff in the market that just aren't quality products...
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Old 08-02-2005, 06:45 PM   #4
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Forgot to ask what brand of salt were you using? and how often are you doing your water changes...
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Old 08-02-2005, 07:25 PM   #5
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It could also be the type of water you're using for top-offs and water changes that are depleting the calcium. Try getting another kit like Salfert to see how close they are.

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Old 08-02-2005, 07:54 PM   #6
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I am using salfert, new kit. also am using seachem kit for the same readings. I am using DI water for 15 gal water change and have this service done every 15 days using oceanic salt,which I prepare 1 day before this service. my tank is 72 gal.
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Old 08-02-2005, 08:00 PM   #7
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You could do what some here do and add a calcium reactor for consistency.

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Old 08-02-2005, 08:30 PM   #8
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Have you tested you alkalinity also? you need to balance them both..
bionic 2 part system is some great stuff
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Old 08-02-2005, 09:27 PM   #9
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My alk is high my kit measures low med. high and I |was using calcium reactor 2 times a week before this started.
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Old 08-03-2005, 12:26 AM   #10
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Depressed mg levels are usually behind low ca levels or boncing ca levels. At 400 - 450 ppm ca, you need about 1350 ppm mg. CHeck your mg (Salifert rocks) and post the results.
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