Thanks Geoff for your informative post. I"ll try and keep the water level a little higher. I think it is about 6/7 but could be 8". I'll try and procure some other small hiding places this weekend. In regards to the tupperware top, maybe I am paranoid but it has been washed before and exposed to soap. Isn't that possibly dangerous for them or did you procure a new one?

Also thanks for the article recommendation, I will definitely read it.