ph too high - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 11-28-2015, 11:51 AM Thread Starter
Algae Grower
 
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ph too high

I have a 55 gallon freshwater aquarium and I have been struggling with water parameters for awhile. It's been set up for 4 years and past few months I have had problems. A couple of months ago my water readings were off so I did water change, better, than a month ago numbers were off. I did 50% than a couple small changes after. Went in yesterday and water was fine, ph was 8.8. Rap water was about 7.6. Did 85% water change on daughters tank same tap water it was perfect. What's difference?

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post #2 of 3 (permalink) Old 11-28-2015, 12:01 PM
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You need to let your tap water gas off CO2 before testing pH to get an accurate reading. Put tap water in a cup, leave overnight, then test the next day. See if that matches your tank water.

Other than that the only other explanation is that you have something in the tank adding carbonate which raises pH. Any new rocks etc been added recently?

Do you have an old aqua soil? They lose their buffering capacity over time.

Last edited by Straight shooter; 11-28-2015 at 12:36 PM. Reason: info
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post #3 of 3 (permalink) Old 11-28-2015, 08:20 PM Thread Starter
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I can try testing tap the way you suggest. I have not added anything new and have fluorite as my substrate, which has been there the life of the tank. @Straight shooter

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