Help a newb plzz

[bamabkj]

i have 72 gallon bow front not setup yet but i bought my skimmer to be a HOB or sump my original plan was to use hang on back but i really dont want all that in my tank and my tank is tempered glass so i cannot drill it how can i setup a sump?

 

[crister13]

You can do an HOB overflow box into the sump and then a U-tube for the return.