Aquariums for exotic fish and axolotls

The exotic fish in the game is begging to be in a tank but to make a tank with blocks takes up space and is bulky and isn't very eye appealing a compact tank would be nice to hold your pet fish you could 

Totally retexture the new pot to look like glass put water in it and boom you have a tank a classic round bowl of water and maby even the ability to make double tanks like with the chest and have a fish limit on tanks or the game could go nuts with one tank with a bunch of fish maby a 2-3 fish limit per tank

And to break it could function like glass without silk touch it will be destroyed.