I ordered the screw-in type last night on eBay...got a pack of 10 of them for $6.45 free shipping. Now I'm wondering if I need the push-in type. I'm gonna use 5-gallon buckets. How do I get in touch with Neil here on BYC to order his? His PM is full. I sent him an e-mail through here, but not sure if it went through. I also sent him an e-mail directly to his e-mail address that was posted in a thread & got returned e-mail on it. A website that was posted on here for him showed up in Japanese or something...maybe just not compatible with iPad? I just don't know how to get in touch with him to order. Oh, & what do you use in this set-up to keep water from freezing? If so, post a picture and/or put specs like wattage & such & if it needs a thermocube as well. Thanks!