custom tank help

[ST33LR4T]

would like to add a refug to the rear of my tank (24x24x16). the refug size would be 24x7x10. would this work? can i use acrylic or stick with glass since this is a glass tank?

[ST33LR4T]

aparently acrylic wont stick to glass with silicon.

so will the glass addition be able to support the weight of water plus some rubble with any type of support? i see lots of people plumb external overflow boxes to their main tank without any support.