Hey Bob, as to the inquiries about the thermometer in your new castle, I thought this could be a great alternative. It's only (2 x 5 x 1/4)in and very light, being made of plastic. It has both the thermometer and the RH (Relative Humidity) meter side by side. I find it quite accurate and it's small enough to be put into a deli box to check the reading of your seed germination. In fact, it's so convenient you can put it anywhere.
I normally carry one around when I go collecting plants in the jungle so that I can note down the readings to be replicated for the specimens I bring home.
It's a gadget meant for checking the environment condition of reptile housing. I have many of them and now they are put to good use for my plants. It's made by ZooMed and you can find them on the net. Have a look at their catalog. They have all kinds of stuff which is also suitable for plants such as heat mats, heat source and very good lighting tubes which is of very high quality.
