Hang-On or Drilled?

[canadaboy]

I plan on buying a 125gal tank shortly and plan on running a 50gal sump.I'm just curious if I should buy a tank that is predrilled or save some money and go with a hang-on overflow.Is there any advantages to the predrilled?(besides not having a box on the back of the tank).If this helps I'm going to be running FOWLR.
Thanks

 

[reefcrazy]

i would go with a predrilled one, yous tink about your overflow lossing siffon, how mush water will end up on the flor.

 

[fshhub]

ditto, on the previous response, plus, a good overflow can range up to 1oo$, pre installed was only 50$ xtra, i really wish i'd gotten one, plus, the hang ons are also more likely ot clog and need more cleaning because they have more joints, a built in can be done wiht one or none in each line
and fowlr doesn't IMO matter whetehr it is either or, but your fowlr willl more than likely become a reef someday(90% of us said it, and changed)