Preventing rot in background wood

[Tongue Flicker]

Is it background plywood or as in driftwood?

Unfotunately, unless it is treated or waterlogged wood it will rot over time just not that fast but can depend on varying conditions

[Mentat]

Cork bark used for most backgrounds won't rot. Slabs of driftwood type woods will resist rotting too, since it's used in aquariums underwater. When a vivarium is newly set-up it's normal for some fungi to cycle in and out as vivarium matures. You need to provide information as to source/type of wood for a more definite answer on it's durability in a high humid environment .

[crumpster]

thanks for the info! I went to a pet store close by and I think it is cork