Small Canister filters for small tanks.

Melll

Member
I am looking at setting up some small tanks again, planted and hopefully looking nice, lightly stocked. I have a Dennerle Scapers tank, the 50 litre one, the Dennerle light and the Dennerle Scapers Flow filter which is a canister but hangs on the tank so that one is sorted. For my other small tanks, a 35cm x 35 x 35 cm cube 43 litres approx, a 80cmL x 40cmD x 35cmH - 112 litres and finally a Flexi Mini Scape tank of 32 x 21 x 24cm - 16 litres, I am needing filtration for them.

I am a bit wary of HOB filters, always worried if the outflow blocks then my room will be flooded, so what filters would you recommend for these tanks? I like canister filters, not so keen on internals for these tanks as they are pretty small. Could canister filters sit next to the tank or do they have to go underneath/below the tank?
 

dw1305

Expert
Hi all,
Could canister filters sit next to the tank or do they have to go underneath/below the tank?
They can go by the tank, they just have to be lower than the water surface, so that the water flows into the canister under gravity. If you look on the Eheim etc. website it will give <"you the minimum head height">.

I have all my canister filters next to the tank, you get more flow (you aren't fighting gravity if you have a low head height), but you need to make sure that the flow into the filter, from the intake, isn't impeded because you can have problems with air pockets.
I like canister filters, not so keen on internals for these tanks as they are pretty small.
I've got <"Eheim AquaCompact"> and <"Eheim 150/2211 filters">. These aren't easy to find now, partially because there are much cheaper small externals from <"OASE etc">.

cheers Darrel
 

Melll

Member
Thank you, :)

So unless I can find some really dinky little canisters shorter than the tank heights, I`m stuck with either the HOB type or internals or am I worrying too much much about the HOB type overflowing and emptying the tank?
 

dw1305

Expert
Hi all,
So unless I can find some really dinky little canisters shorter than the tank heights, I`m stuck with either the HOB type or internals or am I worrying too much much about the HOB type overflowing and emptying the tank?
I’ve had Eheim Liberty HOBs without any problem.

The <” Eheim Aquacompacts” > have the pump in the intake, but they are pretty ugly.

Cheers Darrel
 

Melll

Member
Thank you :)
Well I have bitten the bullet and gone for a HOB and a HOB canister, both from All Pond Solutions, at the price I thought I would give them a go. I will test the HOB on a storage tub with it in the bath, just in case 😬

I`ve just had my bags of substrate arrive, so tomorrow I will be sorting out hardscape materials :)
Thank you again.
 
from All Pond Solutions, at the price I thought I would give them a go.
I haven't tried the HOB, but I got one of their internals on that principle, - worth a try for the price. :)
I thought it would be OK until I could afford a 'proper' filter on payday. About twelve years later it's still going strong (touch wood lol ) still not replaced it, but bought some more for other tanks. :)
 

Melll

Member
Hi Jameson and thank you :) As I sat down to read your post my delivery of the HOB canister and HOB waterfall filters arrived from All PondSolutions, I did look at the dinky Oase, a brand that I love, and will bear that in mind should these not be up to my expectations.

Time to start cleaning tanks I think, after a cuppa of course :)
 

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