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Old 08-30-2012, 11:05 PM   #1 
Dichotomy83
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Little Filter in Bigger Tank?

Right now my betta, Alpha, is in a 2.5 gallon tank kit that I got.

Im thinking about buying him a 5-8 gallon tank, to upgrade. Do you think the filter would be able to handle the job?
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Old 08-30-2012, 11:19 PM   #2 
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What filter is it? Some have ratings for like 5-15 gallons or 2-10 gallons.
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Old 08-30-2012, 11:48 PM   #3 
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Both of my 5g tanks have a filter that is rated for 1-3g and they work great at keeping them both crystal clean. Of course I do regular water changes and vacuum too!
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Old 08-31-2012, 12:03 AM   #4 
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Most likely it's fine as long as it's rated at least about 15 gallons per hour (gph)
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Old 08-31-2012, 12:17 AM   #5 
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You're doing the opposite of what others have done with filters..

I go with larger than necessary because it reduces the amount of WC for me......

For example I have a filter rated for.....
30G in a 6Gallon + new 10G filter for testing
40G in a 10G
80G in a 30G

I haven't done any water changes in at least 2 weeks now. Ammonia is still 0.

You can go with a smaller filter, but you'll have to do some extra water changes to lower the toxics because the filter won't be able to keep up.
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Old 08-31-2012, 01:45 AM   #6 
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Quote:
Originally Posted by MSG View Post
I go with larger than necessary because it reduces the amount of WC for me......

For example I have a filter rated for.....
30G in a 6Gallon + new 10G filter for testing
40G in a 10G
80G in a 30G

I haven't done any water changes in at least 2 weeks now. Ammonia is still 0.

You can go with a smaller filter, but you'll have to do some extra water changes to lower the toxics because the filter won't be able to keep up.
That's generally good for goldfish, but unnecessary for bettas. You shouldn't leave a tank for over two weeks because the solid waste will build up and harbor bacteria, even if the ammonia reading is zero this is still not healthy.
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Old 08-31-2012, 06:58 PM   #7 
Dichotomy83
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Its the filter that came with the aqueon 2.5 Gallon kit. Also, if I buy a 10 gallon tank with a divider do I need 2 filters?
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Old 08-31-2012, 07:08 PM   #8 
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Do you have any way of finding out how many gph your filter is rated for? And no you don't need two filters for a divided tank. Many people make dividers out of plastic mesh so the water flows through.
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Old 08-31-2012, 07:39 PM   #9 
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Originally Posted by finnfinnfriend View Post
Most likely it's fine as long as it's rated at least about 15 gallons per hour (gph)
Yup! I just looked at the 1-3g filter I use in both of my 5g tanks and it is rated for 20gph...good to know, thanks! I didn't know any of that, but knew that they have worked good in my larger tanks.
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Old 09-03-2012, 07:33 AM   #10 
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Quote:
Originally Posted by MSG View Post

I haven't done any water changes in at least 2 weeks now. Ammonia is still 0.
I've heard it highly recommended that water be changed (25% to 50%) weekly to reduce DOCs (dissolved organic compounds) as well as reducing nitrates. Start a thread asking what the DOCs actually are. I tried once to no avail.

For Betta, more important than gal/hr of flow is the sufficiency of area for the bacteria to colonize, combined with the flow over that area. Lots of filter foam makes for a stable cycle even with low-flow,.
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