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Old 02-16-2011, 10:44 PM   #1
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How many gAllons is 20% for 75 gallon water

Just wondering for a water change
I want to do. 20% water change for my 75 gallon tank

Thanks
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Old 02-16-2011, 10:45 PM   #2
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75x.20=15.. granted, you probably have less than 75 gallons when you take in to consideration your substrate, rock, etc... but 15 gallons is going to be roughly 20%
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Old 02-16-2011, 10:46 PM   #3
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10% is 7.5x2=15gallons of parcial water change
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