Filter question

I have a Juwel Vision 260 tank that came with an Eheim Ecco (has two media baskets in so 2234 I think). Will this be enough for the tank or do I need additional filtration? I have it setup so that the intake and outlet are on the same side of the tank although the outlet points across to the other side of the tank and there is a nice current at the surface but not much of one below (plants almost perfectly still). I have a powerhead that I'm not using but would prefer to not clutter the tank up if its not required.

Thanks
Richard

Tank is only just cycled and only has 6 cardinal tetras, 3 dalmation mollies and about 20 fry lol. Will I have to run less stock with this filter or is it powerful enough?