settimg up a 120 gal

[vanreefer]

http://www.canreef.com/photopost/sho...php?photo=4392
Do you think I am making too many holes in the back glass would laminating with acrylic help?

for the CL I am thinking sequence dart returning ~ 2000 gph after head losses
Return pump Mak 4 ~1000 GPH after head loss
Plus a tunze 6100 on a single controller

= ~6000 gph or 50 x turnover

I will be moving an overcrowded 75 worth of stuff in including ~100 LR

Debating the sand issue with 50 X turnover I am worried about a sand storm

The tank will have a 60 gal as a sump with ~40 gals of water an ASM G4X for a skimmer and an aqua-chill 1/4 hp chiller, and downdraft style Ca reactor

Thoughts...things I have overlooked...? any comments would be appriciated

Thanks
Dan