This is the heater I use. It works great and comes with a cover and is adjustable. https://www.amazon.com/gp/aw/d/B0BKZ3LZGK/ref=sspa_mw_detail_2?ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWwp13NParams