There are too many options to ever list. I would suggest a herpstat as they have a long term track record and have lead the field in safety options. I would tend to run one piece of heat tape. Either 11 inch flex watt or actually just buy a UTH pre-made. The advantage of remade is it is fully certified over the diy electrical appliances. Where I am diy heaters must be wired by an electrician.
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