OK - if you listen to Reptile Radio - Dan speaks to this around 55 minutes into the show. He said the following - I took notes! LOL

In 1995, they were using all melamine racks, and they had a lot of sick animals, enough sick animals to be concerned with. Someone suggested melamine racks being the culprit.

So, they had air tests done inside the racks, and the lab called them and said "where exactly are you testing this?" And Dan told them "uhhh, snake racks" and he was told that the formaldehyde levels were at levels that would kill a human. He said he still has the test results somewhere that he can pull up.

Take it for what it's worth!