when i have the time to set up my pico im acctualy going to try some.. i found
http://www.cerameco.com/
and they seem pretty legit. from what ive herd from people that acutally have bought from them they acctually work..
plus they have some awesome designs... i hate aquascapeing...
its deffinatly not cheaper though... its basically base rock when you get it and you have to seed/cure it yourself.. i was quoted 150-200$ for 30 lbs.