The link u sent will not work for an aquarium cut as it is tempered glass and can not be cut if you try to cut it, it will shatter almost instantly to small cubes
Lucky for me I have a local place I go to, to get my glass for cheap unless I am dreaming and can get it for cheaper but here is what I got
1x - 36"x18"x.25" thick
2x - 2 10 gallon full glass lid .25" thick also
Price for all was around 17-25$ wasn't sure but around that price
They have multiple sizes at the site I posted, I didn't look, but there may be the sizes the op needs. Then it's just a matter of silicone.
20 gallon with some Danio, Neon tetra, ghost shrimp, and algae eaters.
10 gallon Shrimp tank, currently with Ghost shrimp.
75 gallon Angles and black skirted tetras.