Posted: Sat Sep 22, 2007 11:49 am
The wood pictured in the link you gave is not meant to be in a wet environment--it's to be used as a refuge for reptiles other than aquatic turtles.
If you want to make a cave, it would be better to use a material that's more durable. If you want to raise the basking level, consider a basking area that can be adjusted to the water level, like a turtle dock.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-