i got 300 Gal. (72 x 34 x 31 ) is 1" thick , 90 Gal. refuge 60 gal. swamp all Acrylic. If i was you i will got MAX. height 28" , pain to clean , no matter Acrylic or Glass , never like sand , so i run BB most of the time , i use to have glass tanks got scratch also , not sure if you can remove at easy Acrylic. Not to mention how "pure" SPS look on Acrylic compare with any Glass. I clean by using one special sponge for Acrylic , manual, i give up one magnet, i got more control , not to mention how easy you drill, i mod. my overflow i make it one side , in stand back, in my opinion is more efficient , remove Detritus a way faster ( in special when run Gyro pumps). Now C/P
" Acrylic aquariums are 17x stronger, softer and more flexible than glass.
In addition, they are more impact resistant, weigh 50% less and are not prone to chip or crack.
Acrylic aquariums offer better insulation than glass aquariums, reducing temperature flux and improving the quality of life for your fish.
Acrylic fish tanks are as clear as optical glass (at 93% transparency) and don't add a green tint. "