@beekissed: You use fermented feed in a wooden trough? What did you use to seal (waterproof) the wood, and how did you build it without metal screws or nails, as I heard that FF and metal are a no-no? I ask because I do need a bigger trough, and wood and I are old friends.
I didn't use anything to seal it, nor waterproof it. And I used metal screws, as they are sunk into the wood and not much exposed to the FF...and that FF is gone so fast that it doesn't have a chance to effect fasteners much. If you'd like to use some kind of silicone sealant to try and seal off your fasteners it might work....but then again, it might not. I've got holes drilled in the bottom of these troughs so that any excess fluid drains off of the feed , thus moisture just isn't much of an issue.