[mulita]

I would reccommend you having the bottom glass under the sides pannels.

I would also recommend you to have ground edges all the way around or minimum in every side that glass will do a joint as this reduces change for leakage. Yours is going to be a cube but anyway try to have both "sides" glue to front and back of the aquarium.

You can do your assembly using only duct tape, however for 1/4" thinckness I recommend you to use clamps for the walls, IMHO is better to use the straight press clamp than just the corner type, the reason is because you want to maximize contact area within the joint section. you must use at least 2 clamps per side (4 in total for the assembly) if you additionally add duct tape better. Don't be affraid of doing a good clamp, it will actually be better as you wont have any leaks. Having the bottom under the sides will itself do a good press to assure a good joint without leakage.

You can also get a good Glass and aluminum grade silicon at Home depot.

 

[mulita]

you should call some local glass shops and get some qoutes! machine edge is the way to go...is this going to be braceless?.....

I agree, I did the same. this is more important if this is going to be 1/4" thicknes or over as hand grind only work good for thiner glass. They will charge you per yard but it will be worthy at all.