My turtles seem to like natural to artificial. This tree in the picture was perfect in that it had a natural rising hump regardless how high or low the water was. While trying to adjust the log I broke it and the turtles won't use what is left of it. So I made an artificial one for them, a 12' 2x6 with a blueboard float on the end and a 12 foot brown aluminum siding on top of the board. Not one turtle has been on it. I may drop a dead weeping willow that is next to the pond and see if they like that.
