what do you cure or hold your live rock in? i am buying 50 or 100 lbs next week or so and i remember from years ago not even the 55 gal rubbermaid was spacious enough. i used a portable spa that was 300 gals but the liner ripped so i threw it out it was so flimpsy. anyone use anything that is sturdier? even the rubbermaid container bends out with all the water and rock. would be great to find like a 100 gal or more plastic vat or something... any sources? i don't want glass tanks because its too much a hassle to store and move when its moving time again.