Why is Acrylic considered better then an old fashion glass aquarium???
Is it just because it is less likely to break?
If so, a glass aquarium is not THAT easy to break if your careful, so why pay so much more?
I know of more than one person in my circle of fish friends who spent the extra money on an acrylic tank because it was lighter and clearer, only to regret it later when they found out how easily it scratches.
get a well made glass tank (eg. from All-glass, Oceanic, Perfecto etc.) and you will be fine.
Acrylic tanks are MUCH lighter than glass tanks and initally are much clearer as well. they scratch easilly however and usually distort under pressupe so most acrylic tanks are heavier braced and less open on top. Acrylic tanks are bonded rather than siliconed so they hold up well in the long run. Personally I'll always take a glass tank over an acryllic one given a choice but once you reach the 300 gallon size the weight of the glass becomes prohibitive.