Buying aquariums from stores is cheaper and faster than building aquariums on your own.
And yet, specific projects requare aquariums that cannot be find in any store.
I build my aquariums for specific projects using whatever materials available and suitalbe for needs of each particular project.
That is how I've been testing limits and possibilities.
Here is one thing to keep in mind when building aquarium for fish -
Fish grow all live long. Make sure your aquarium is a good fit for your aquatic pets.
Check links bellow for more details.