Mold in sump cabinet

[Baldy]

The unfortunate part is the tank is up and running, and I have nowhere to put everything to tear it down. I was more thinking of a way to get the mold off the wood. Would a rag soaked in bleach solution be ok?

I'm not really attached to the cabinet. If I set up a new tank or move this one, ill be building another as its not optimal for having a sump