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Old 01-05-2010, 05:18 PM
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Default Proper water changes

Hi. I want to know what is the proper amount of water that should be changed weelky on a 40 gallon tank with 3 fantails in it. I also have a 15 gallon with 1 fantail. Thanks Mike
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Old 01-05-2010, 05:54 PM   #2
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general rule of thumb is 10% weekly so about 4 gallons a week for the 40 and 1.5 gal for the 15.
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Old 01-05-2010, 05:57 PM   #3
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Quote:
Originally Posted by Telgar View Post
general rule of thumb is 10% weekly so about 4 gallons a week for the 40 and 1.5 gal for the 15.

Yup, he's right. Anywhere between 10-15%.



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Old 12-30-2011, 08:41 AM   #4
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I changed about 15% in my 30 gallon with 2 goldfish, but 10% is about average for a weekly water change as long as your fish are doing ok and the tests are good.
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