its been awhile since ive been on here, ive been running a 20 nano reef and 55 gallon reef for the past few years but i finally decided to go bigger so i picked up a 110g with two predrilled overflow boxes and a 40 gallon breeder sump. i am familiar with sump set ups but not to a large scale. what im trying to figure out is what size return pump i need? gph? head height from the sump to tank is almost 5ft. also sump is drilled as well and has a bulkhead on the side could this be for a return pump? sorry for all the questions i just wanna get this thing set up. Thanks!