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Filters for a low tech Betta cube

Karmicnull

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Joined
6 Sep 2020
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460
Location
Cambridge
Hi Folks,
I'm putting together a 40cm Cube (60L total) which will house a Betta. I'm intending to keep filtration slow and gentle to keep the Betta happy, so will be using a sponge filter. I've not used a sponge filter before so this is an exciting new venture. My question is: will one be enough, or should I put a couple in? At the moment my internal dialog goes: "put 2 in, then you're safe and you have redundancy" vs. "yeah, but then you're taking up twice as much real estate with ugly bits of kit that aren't plants or hardscape." I'm torn.

Also - related question - how do I know my air pump is pushing enough air through? I've got a super-silent little airpump that's laid back and gentle, or a mental tetra one that would do just fine to pump up car tyres!

Cheers,
Simon
 

dw1305

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UKAPS Team
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7 Apr 2008
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12,478
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nr Bath
Hi all,
My question is: will one be enough
Sponge filters are very efficient at biological filtration so one will be plenty for a betta (and a lot more).
One should be fine, as @Nick potts says they are efficient biological filters. Have a look at the <"Envobee ones">.

I've used these <"big sponge blocks a lot"> (although mainly with a powerhead).
......... They are the <"12" x 4" x 4" sponges they sell for Koi filtration">. I just looked and the 12" ones are £8.75 at <"Rainbow Koi">. .......

cheers Darrel
 

mort

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15 Nov 2015
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1,752
Nick sums it up perfectly. If the tank is planted you could normally get away without any filtration if it's just a betta (although I'd always have one).

I also think having one is better in this case because it doesn't disturb the surface of the tank as much, which the betta will appreciate.
 

Gill

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17 Mar 2008
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SinFin Derby

Karmicnull

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Thread starter
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6 Sep 2020
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460
Location
Cambridge
Thanks @Nick potts, @dw1305, @mort, @MirandaB, @Gill for a comprehensive overview of low flow filter options. I got <this> for Christmas, so my choice is preselected, but I've been looking at those Hidom filters for a while now - I'm definitely going to try one at some point for something! And I agree that nano corner filter is aesthetically fabulous.

Cheers,

Simon
 

dcurzon

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4 Jul 2020
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378
Location
Essex
I have the small one of those connected to a usb air pump. Its set on a timer (6pm - midnight), as a source of surface movement/aeration to gas off co2 and clear any surface scum.
I think the water looks much improved since adding the sponge filter, that I'm looking to get another for the other tank.
 

jaypeecee

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21 Jan 2015
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2,039
Location
Bracknell
@jaypeecee I’ve got the smaller version of the dennerle corner filter - silent and does the job nicely, though takes up valuable space in my dinky tank
Hi @aec34

Thanks for the feedback.

Yes, with a 20 litre cube, even the smaller Dennerle Corner Filter wouldn't have much room. But, a strategically-placed plant or two might work wonders!

What's the quality of construction of the Dennerle filter like? I believe they're manufactured in Germany so I would have high expectations of them.

JPC
 

aec34

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10 Oct 2020
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280
Location
Gloucestershire
What's the quality of construction of the Dennerle filter like?
Hi JPC, I’ve got little to go on since I’m quite new to this game, but it’s pretty robust. Plastic components are all a good fit, and come apart and go back together with little worry about snapping anything off. Bubbly outlet pipe is fiddly to clean, even with the little tool supplied, but I’m pretty happy with it.
 

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