I had an acrylic tank years ago. I liked it for quite awhile, but finally the difficulty getting algae off the inside was too much. And, the sides bow out much more than glass tank sides do, which I thought didn't look good. But, they are certainly lighter and easier to handle, and when new are much clearer. The tank I had was back in 1967. I used it until about 1972, when I gave it to a friend, who, the last I heard, was still using it for goldfish. So, they are certainly durable.