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Old 09-14-2011, 09:02 PM   #1 
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jdvyner's Avatar
Join Date: Sep 2011
Location: DC
When should I change my tank water?

I am a proud new owner of a beautiful new betta named Filet and had some questions regarding cleaning and adding new water. I have a Aqueon 2.5 gallon tank with a filter system already installed. Its almost been A week since I put him in it. Should I already clean his tank and give him new water or wait. Any advice would be appreciated. Thanks much.
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Old 09-15-2011, 12:31 AM   #2 
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Join Date: May 2011
Location: California
Yes, the tank needs to be cleaned. On a 2.5 gallon the filter is more of a water mover than anything. The tank cannot hold a cycle, so the normal benefits of a filter on a larger tank don't apply. You will need to do one 50% and one 100% change a week. So two changes a week total. Tanks that are 5 gallons and larger can hold a cycle in the filter and only need partial changes once or twice a week depending on how many fish you have (after the cycle is established that is). Some people have managed to have planted tanks that need no water changes, but this is a hard balance to achieve, and there is some controversy surrounding this idea.
Good luck!
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Old 09-15-2011, 01:40 AM   #3 
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Join Date: Aug 2011
Location: Sydney, Australia
Exactly what Kyt said :)

Definitely time for a water change!
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