"Altum" wrote in message
. net...
I want to make small sponge filters for a couple of two gallon betta tanks.
They are planted, but I think they could do with a bit of filtration and
some gentle water movement. I found these directions but I will use an
airlift rather than the powerhead.
http://www.hagblomfoto.com/article_spongefilter.htm

I got some 1/2" rigid tubing and the airline. How much sponge do I need
for one betta? Would a chunk about 1" square and 4 or 5" tall do the
trick? Also, is open cell filter sponge even the best material or should
I be considering using some sort of matting? I'd like to make something
small, simple and low-maintenance.

Thanks for any ideas.

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Altum, i was thinking about that my self, the hang on the back filters cause
to much movement then when turned down dont do their job, what kind of
powerhead are they talking about? i have a powerhead on my bigger tanks
connected to an underground, is that what they mean, would that cause to
much movement in the water. do they sel the sponge at any pet store.
nik
You know i was thinking it would be nice if they made bigger sized of those
penplex four compartment holders for betta, for people who have a lot of
them, like make them 5 gl but connected, never mind i am probably not
explaining it right.