I would like to know whats a good filtration system for my new reefer 450 and what type of pumps are good that will fit with the sump that comes with the tank .
Aren't you getting the whole package reef ready? If so, it should all come with it. If you are not, just use the specs they supply you with from Red Sea. If you have a sump with the kit, you don't really need any additional filtration other than a filter sock if you want it...a skimmer would be a must though if you are going to have corals.