the ones with "rock" backgrounds are most likely made of foam.Are all those rocks real? Do you think the bottom of the tanks are re-inforced? How about the backs, love the rock walls.
WORD!the ones with "rock" backgrounds are most likely made of foam.
otherwise the rocks look real. Most people put an eggcrate on the bottom of there tank to distribute the weight better. eggcrate can be found in the dropcieling section of homedepot, etc. and is a 2' by 4' sheet of little sqares.