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Old 09-21-2009, 02:10 PM   #11
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I would encourage you all to try to determine better means for buffering your pH rather than those additives.
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Old 09-21-2009, 03:00 PM   #12
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Yup... adding fresh top off water shouldn't effect your pH at all. If you have low pH, it's most likely not due to your top off water, but for another reason.
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Old 09-21-2009, 03:38 PM   #13
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Quote:
Originally Posted by neilanh View Post
I would encourage you all to try to determine better means for buffering your pH rather than those additives.
Very well put. What is your PH at now Matt? What is it right before the lights go out?
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Old 09-21-2009, 06:29 PM   #14
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Cheapest PH solution I've found...pickling lime a plastic coke bottle (Liter) and a 1/4" airline hose.
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Old 09-21-2009, 08:30 PM   #15
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Yup... adding fresh top off water shouldn't effect your pH at all. If you have low pH, it's most likely not due to your top off water, but for another reason.
Why wouldn't it affect the tank water? I am adding 6.6 ph water to a tank that is suppossed to be 8.2. Without buffering the incoming water, the main tank will eventually start to fall. In my case, it did. My salt water is 8.3 when I mix it. I use Oceanic mix. No problem there. My tank's ph is around 7.6. Everything else is fine. I am still looking for a reason as to why I am battling w/ the hair and cyano algae. PO4 is zero coming from the ro unit. Tank water is also zero. NO2 and NO3 are almost undetectable. CA was 430. MG was 1410. SG was 1.025. All of these results were 3 days ago. I am scheduled for a pwc on Thur. I regularly do a 15 gallon pwc one a week.
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Old 09-21-2009, 09:36 PM   #16
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What is your kH/Alk? This measures your buffering capability and can help diagnose the problem.
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Old 09-21-2009, 10:10 PM   #17
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You should answer neilanh's question first. That is the ph that you add to the tank not the ph coming out of the RO....if you are talking about makeup water...remember that only pure water evaporates and that has a ph of 0...
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Old 09-21-2009, 10:16 PM   #18
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Thanks thincat I was just going to mention that RO water essentially has no pH because there are no (or should be no) ions left which is what pH is a measure of.

Also, if you are battling algae, adding any sort of "pH up" is probably going to make things worse as many of those products are loaded with phosphate. I agree that you need to check your alkalinity and kH.
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Old 09-22-2009, 01:39 PM   #19
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My alk was 9.5dkh when I tested the others. I have been adding the Seachem Marine Buffer (1 tsp per gallon of ro top off water) and the Seachem Reef Builders for the alk...........
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Old 09-22-2009, 01:44 PM   #20
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You should answer neilanh's question first. That is the ph that you add to the tank not the ph coming out of the RO....if you are talking about makeup water...remember that only pure water evaporates and that has a ph of 0...

That's odd. I was always of the understanding that the PH of pure water was 7.0, by definition.
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