The other problem I have with wood is you can't really disinfect it...I clean the insides (especially the ceiling) of my plastic racks with disinfectant when I clean tubs...
That's very true. Anything not "sealed" with a lineaments of some kind like melamine is would prove problematic to keep clean I would think, especially if you're not using lids on your tubs.
7.6 Ball Pythons
1.0 Argentine B&W Tegu
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