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Old 12-21-2011, 06:12 PM   #1
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PH Problem

Can't seem to keep my PH up.

125 gal, IO Reef Crystals, changes every two weeks, have a refugium with Crushed Coral (separated from sand on top).

I've used a liquid reef PH buffer by Seachem, but it's pricey and doesn't get me up to 8.4. I hover around 7.9 +/- .2

Any ideas?
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Old 12-22-2011, 10:38 AM   #2
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Kalk will definitely help get the PH up a bit, but use it cautiously.

How old is your system? PH can fluctuate pretty heavily on newer systems.

May also want to add (if you don't already have one) a powerhead up by the top of the tank rippling the surface: increases co2/o2 transport and that has the effect of helping keep PH where it should be.
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Old 12-22-2011, 11:08 AM   #3
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System is going on 11 months.

I have two PH's at the top breaking the surface.

Never tried kalk. I do use an ATO unit, maybe I should be adding something there?
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