Although it is important to choose an aquarium that you think will look good in your living room, there are other equally important considerations that affect the ongoing expense as well as the health of the inhabitants. Acrylic vs. Glass 1. Acrylic is a better insulator than glass so a smaller heater will work for the same sized aquarium and temperature fluctuations happen slower.
Acrylic is clearer than glass.
Acrylic can have a much greater variety of shapes. Perhaps the biggest disadvantage of acrylic is the cost. Usually an acrylic aquarium will cost 2 to 3 times what a similar sized glass aquarium would. In general we have found that stability of the environment is the most important aspect of successful fish keeping. In choosing all of the items and the fish themselves, always keep in mind the stability of the environment.