12-10-2009, 09:53 PM
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Sure there are. I had a 2.5g tank that had a rio 50 in it. It worked well for about 9mo and then i took the tank down. The only thing is with the RIO line of pumps, they can start to shock ater a period, so perhaps look for a different brand, but You could put a Maxi Jet 600 or 800 in there and it should be fine.
As for the active carbon, I personally wouldn't use it in a small tank like that unless you knew something was dropped into it that should have been. Water changes of 10% should be fine or 20% just to make it an even 1g.