Hi Tore,
Congratulations on finding the forum. I'm sure you'll like it here. I've been meaning to write a concise article about thiaminase for a while now, but in order to make it credible, I need to have find more, legitimate references. That's a fair amount of work, so I've been having trouble getting motivated about it (and because I have a ton of other work/writing to get done).
We've had a couple of pretty good discussions about thiaminase. For starters, I'd recommend reading this thread (
first shed...), starting in the middle of page 5. Within this thread, you'll find a link called, "nutrient requirements for mink and foxes" or something like that. It will take you to a 2 page table that lists fish that have been analyzed for the presence of thiaminase.
If you still want to know more, after reading this thread, you can search the forum for thiaminase by hitting the "search" link in the dark green bar under where it says "Welcome GGarter" in the top right corner. Then type in the keyword "thiaminase," and off you go. Feel free to ask any more questions about it, if this doesn't satisfy your curiosity.
I'll leave the enclosure question to everyone else. There are a lot better set-ups out there than I have. I just use glass and plastic enclosures, but there are some really awesome ones out there. Again, welcome to the forum.
Rick