Juwel Rekkord 800 filter suitable for marine?

[MarineEddy]

Hi, I am setting up a Marine FOWLR tank and was wondering if the media filter that came with my Juwel Rekord 800 would suffice or would I need an extra filter adding. If so can anyone reccomend a good INTERNAL filter (as i don't have a sump) Also if I do need an extra filter does anyone have any opinion on the Fluval U3 or U4 as they are the only two I have seen so far,
Thanks in advance, Eddy