High PH problem - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 06-03-2009, 09:32 PM Thread Starter
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High PH problem

I just tested my PH and noticed its between 8-8.5.
Im averaging 3.6 watts per gallon over a 72 gallon planted tank.
My substrate is eco complete so I know that might be part of my problem.
I dose excel daily, as well as phosphate, iron, etc twice weekly. Would pressurized CO2 help lower my high PH?
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post #2 of 6 (permalink) Old 06-03-2009, 10:00 PM
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Why do you want to lower your pH?
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post #3 of 6 (permalink) Old 06-03-2009, 10:42 PM
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My pH from the tap is 8.2 and I've kept most everything in it, including discus. No problems so far.

Got Plants?-6 CO2 + 12 H2O → C6H12O6 + 6 O2 + 6 H2O

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post #4 of 6 (permalink) Old 06-03-2009, 10:45 PM
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With 3.6 watts per gallon, (4-65 watt PC bulbs?), you should be using pressurized CO2 anyway. It will lower the pH, but with that high a pH I assume you have lots of carbonates leaching out of the Eco Complete substrate, so it won't lower it very much. Except for a few types of fish and plants, it won't matter to them anyway.

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post #5 of 6 (permalink) Old 06-04-2009, 04:35 AM Thread Starter
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I wanted to lower it to around 6 so that I can keep cardinal tetras. My buddy had hooked me up with 24 of them, to have them all die one by one daily. I only have 3 from the batch of 24. Other than the PH, my only other conclusion is that the bigger fish were stressing them out.

The PH was the only alarming issue when I tested various water parameters.
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post #6 of 6 (permalink) Old 06-04-2009, 06:20 AM
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The hardness of the water is probably really high. That will kill the cardinals quicker than anything else. Did you test GH/KH?

CO2 will lower the pH, but lowering it without softening it doesn't really affect the fish at all. Only real solution is RO/DI water to soften.
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