nope, porltand cement based concrete ina bag. 5 bucks a bag or so from home depot... it came with some agregate in it, which was annoying... but oh well... I don't plan on having too many rocks in there anyhow... there is NO substitute to a good piece of live rock. even a cured piece with no diveristy of life on it... or a seeded dead base rock (fossilised reef, tufa, etc).
|