Posted: Mon Jan 28, 2008 8:31 pm
I think that you'll just be adding more pressure to the sides of the rubbermaid and increasing the chances of a leak.
I have one of my turtles in a rubbermaid storage bin until I can upgrade him, and I've had no issues with them melting.
You can buy a heater guard if you're worried about the heater, and the lights shouldn't be shining directly on the sides, so I'm not sure how you'd be generating enough heat to melt the container. If your bulb is that strong I feel like it's be heating the water up too much as well.
To insulate my rubbermaid tank, I have it sitting on a towel and a giant trashbag (that's also in case it springs a leak). At night, I cover the top of it to minimize heat loss through evaporation. I've been able to keep the water temp pretty stable that way.
2 RES: Leo (f) and Ezra (m)
1 Russian Tortoise: Godzilla (m)