sump / fuge questions?

I guess the first question is, do I really need to ryun a fuge on a 100g fish and softies tank with a 1-2" sand bed? If the answer is yes then check out my plans below. What Im thinking of is a 33x13.5x13 sump and a 16x14x13 fuge. The fuge would have 2- 1" bulkheads draining into the return section of the sump. Im just not sure if this is an optimal setup or not?