"Eric Schreiber" eric at ericschreiber dot com wrote in message
...
There are a couple makes of small, submersible filters that you could
probably hide in a tank pretty well. I'm using a Duetto DJ50 in my 10
gallon betta tank, and I think Fluval makes something similar as well.

Not sure if they're available where you are, but Resun have some very nifty
small internal power filters, eg. the Mini, and the Magi-Jet 200. Both
rated 200l/hr, and the Magi-Jet has a little spray bar attachment. Either
would work well in a 10 gallon. And they're cheap.

Vicki PS