Hi thanks for your replies yeah I got the tank with the filter already stuck in place and tbh im thinking about taking it out already I dont think its that good I put sand in and when I put in the water I kicked up some crap out of it, had the filter running 3 days now and it hasnt touched the cloudyness.
and the filter is perfectly clean I thought it would of had some sand in it by now, I phoned up the shop I got the tank from and they say there is nothing wrong with the filter, but tbh I think its crap....