Hi everyone after my last tank leaking I went and ordered an acrylic 400 gallon tank it will be coming in 6 weeks .what type of Skimmer would you run on this my total water volume should be a out 550 after sump frag tank etc ...Im always heavy stocked ..I don't know what to go with it insump,external (never ran and external before ,alittle scared of flooding ? Downdraft,beckett,? Brands or type ? What do aquariums use to skim?