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Old 02-21-2011, 04:28 PM   #1
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What PH is too high?

I am having a hard time keeping my PH at 8.4. It's been as high as 8.7. I've been using a little acid buffer to slowly lower and I've been doing daily water changes to lower nitrates. I think the two are related. I have one PWC to go to get my nitrates below 10.

What us too high for PH and what am I aiming for?
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Old 02-21-2011, 04:53 PM   #2
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What you're struggling with is probably best explained here...

http://reefkeeping.com/issues/2005-03/rhf/index.php

Before anything though, make sure your pH readings are accurate - either by getting a couple different liquid test kits or getting a digital meter.

What salt mix are you using?
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Old 02-21-2011, 04:56 PM   #3
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check your alkalinity, if you can't maintain your pH your alk could be off

anythign above 8.4 is to high and considered alkaline, anything below 8 is considered acidic
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Old 02-21-2011, 08:50 PM   #4
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IO reef crystals.

I need an alkalinity test then. Don't have one yet.
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Old 02-21-2011, 10:12 PM   #5
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Looks like a faulty probe. According to my API, it's only 7.8
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Old 02-22-2011, 12:44 AM   #6
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Yeah... if you're using Reef Crystals and getting a pH of anything over 8.4, I'd say that you're either using some type of additive that boosts pH or it's a faulty reading.

What probe are you using? Has it been calibrated recently? Electronic probes, even ones in constant use, should be recalibrated monthly.
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Old 02-22-2011, 01:42 AM   #7
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Milwaukee. It's too old . Ordered a new probe.
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