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Old 12-29-2003, 02:17 AM   #1
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how can i lower my pH?

Like i said, i need to lower my pH, it has been at 8.6 for awhile, and i've tried water changes, stopped adding vitamin c, haven't been dosing calcium or alkalinity, and still can't figure out why its so high!
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Old 12-29-2003, 08:53 AM   #2
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What kind of water are you using? Tap? RO/DI? If it's tap water, what is the pH of the water you're using to do water changes? What is your alk level?
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Old 12-29-2003, 07:06 PM   #3
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i'm using ro/di water from my lfs and i don't have a test kit for alkalinity
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Old 12-29-2003, 07:35 PM   #4
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do you have adequate water flow? 10x the amount of the tank per hour. Are you checking during a photo period? Is the top covered? Lots of questions to be answered.
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Old 12-29-2003, 09:08 PM   #5
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i'm running a 330gph and a 400gph, i am checking at 5:00pm with the lights on, and the top is covered
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Old 12-29-2003, 10:02 PM   #6
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Do you test the pH of the ro/di water you get? What is the pH of your SW when freshly mixed? I would invest in an alkalinity kit, they come in handy even for FO tanks.
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Old 12-30-2003, 12:37 AM   #7
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Quote:
and the top is covered
i would guess this probably isnt helping at all.
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Old 12-30-2003, 10:10 PM   #8
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ok, i just checked alkalinity and its at 6.5meq/l!!! And my pH is still at 8.6. My LFS just now told me all i can do is to do a 50% water change(of course not all at once) and to still add buffer, but only a 1/4 of what i have been. I need some advice. Do u agree with the LFS?
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Old 12-30-2003, 10:48 PM   #9
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Take your PH at night well after the lights are off.

IMO, the PH is a bit high but not that much higher than the target of 8.2-8.4. I would leave the tank be without adding buffers here and there and see if the tank can balance itself. A high alk reading does not mean impending doom.
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Old 12-30-2003, 11:30 PM   #10
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so what should i do about the alkalinity, because here in about 3 months i'm gonna start adding a few corals, and even if it isn't a big deal, i'm very picky when it comes to my tank, and i can't stand for either my pH or alkalinity to be too high
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