If your going to be using flex-watt (or any heat sources in my opinion), you're going to need a heat controller. A dimmer type reo-stat will work, but getting a quality thermostat would be a smart thing, not only for your Boa, but for your house as well.
Another heating option to are radient heat panels. I use "Pro-Product's RHP's- they have a 10yr guarantee, with an expectancy of up to 50yrs - so I've been told. The low end should be raised in your cage though, no question.
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--aka DMOG68

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