sorry i dont have any knowledge on other types of glue used for joining acrylics.
i know of choloform because i used it in sch for my poject during sec 4 .. after the project was over the pieces that werent done properly before fell off soon after. there are however some that are still intact until now (3 years later) its in a display so i dont know what will happen if i touch it.
in my opinion i dont think choloform will not hold very well as there is still the water pressure that the joints has to bare. further more the using a 5mm thick acrylic, the contect point of which both pieces of acrylic meet is very small. if i am not wrong, choloform kinda "melts" the acrylic on both contect surfaces so when both pieces meet it kinda "merge/fuse" together, therefore i think it will only hold if the contect area is large. i wont recommand choloform unless there is not other choices of glue avaliable. i think skill plays an important role too.
my input is based on what i have done in secondary school and my expriences that i had with choloform. if there is any points and facts that i had stated wrongly please do correct me
cheers
cheers