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Old 05-23-2013, 04:15 PM   #1
CTet
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Filter too small?


Hey there,
So I just purchased my first canister filter! It's an Eheim 2211. I am going to install it on my 25 gallon which likely only had about 20 gallons of water in it due to substrate, driftwood, etc. I see that the 2211 is rated for tanks up to 39 gallons. However, I've been researching an only getting vague answers. Most say to err on the bigger side. I'm currently running an Aquaclear 50..
The Eheim 2211 is certainly an upgrade, isn't it?
What do you guys think?
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Old 05-23-2013, 10:17 PM   #2
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Default Filter too small?

Well, I'm excited regardless.
I purchased some seachem matrix and some fluval prefilter rings for some mechanical filtration. Should be a step up from my AC!
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Old 05-23-2013, 11:18 PM   #3
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As far as I know, the pre filter rings don't do much filtering. Its ment to break up the flow of water so it flows up the other media more evenly instead of flowing in a tight stream. It's a waste of capacity if you ask me. Use foam pads for mechanical filtration.
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Old 05-23-2013, 11:44 PM   #4
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I have to disagree with you on the mech rings. I find it catches a lot of the larger debris in a planted tank, I clean a ton of stuff from the rings when it's time.

Although it is a 2211, more sponge might be better
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Old 05-23-2013, 11:48 PM   #5
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Default Filter too small?

Quote:
Originally Posted by CTet View Post
Well, I'm excited regardless.
I purchased some seachem matrix and some fluval prefilter rings for some mechanical filtration. Should be a step up from my AC!
Good to know. In addition to the matrix, the ring description states that they have a good surface area for BB to grow as well.
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Old 05-24-2013, 12:49 PM   #6
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2211 will likely be too small for your tank, depending upon how heavily it is stocked. For a tank that size, I'd go with at least an Eheim 2215.

If I were you, I'd run both the HOB and the canister.
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Old 05-24-2013, 03:58 PM   #7
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Default Filter too small?

Man, that's definitely a bummer. Is it the lack of filter media? Flow rate? I've only got some shrimp and about 10 cardinals so bioload should be an issue.
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Old 05-24-2013, 09:52 PM   #8
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With that bioload, you'll be fine.
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Old 05-24-2013, 10:03 PM   #9
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Default Filter too small?

Thanks, that's what I was hoping. It seems like there will be more filtration than my current AC 50.
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