EDIT: DO NOT ATTEMPT! POSSIBLY DANGEROUS FOR ANIMALS!
Condom Ecosphere Vid
Click play to watch. Thanks all, took a lot of work.
Step 1: Watch video.
Start off by opening and cleaning condom with water. The thinner the condom, the more easy to see through, but the weaker.
Step 2: Pour Gravel, plants, and snails
Step 3: Add fish
Make sure to hold the lip of the condom, as it will want to lose grip as it fills with water.