I have three hides in my tank. Its a 20L and my guy just a youngin. I know the half logs are not recomended at all, but I didnt know that when I got them...and they were recomended to me at petsmart. Ugh!!! I have 2 of them and one hide is a ceramic hollow bonsai tree. One half log is small and the other one is bigger. The two half logs are on the warm side, the bigger one is set up more to fill space, but he could get in it if he wanted. The bonsai tree is on the cooler side. He spends all of his time in the small half log, did spend the first day in the bigger half log. he has not gone in the bosai in the time I've had him, though he has climbed his branch up to the top of the tree and layed there a few nights. Anyways, sorry for the long post. Is this ok or do I need to ditch the half logs, and maybe get two other identical hides since he is obviously not interested in the tree? He ate woderfully and seems happy, athough he hasnt left his small log since he ate.