coralife 65 skimmer

[evaneatspie555]

i bought a coralife 65 skimmer and it can either be a hang on or an insump. either way i will have it in my sump but is one way more effective then the other. any help on this dilemma would help because if i can hang it on the sump it would give me a slightly larger refugium area to work with and if its better in sump i would make a seperate refugium that is pump operated and drains into the sump ?plz help