Submersible Pond Heaters

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Submersible Pond Heaters Submersible pond heaters drop directly into the water, providing precise thermostat-controlled heating for koi ponds. Unlike floating de-icers that only keep a surface hole open, submersible heaters can maintain a target water temperature — important for show koi, quarantine tanks, and regions with extreme winters. Applications Stainless-steel submersible heaters are commonly used in quarantine tanks to maintain the elevated temperatures (78–82°F) needed during parasite treatments. In pond applications, they can maintain a minimum water temperature that prevents koi metabolism from shutting down completely. Pro tip: always use a heater guard or cage around submersible heaters in koi ponds — curious fish can burn themselves on the heating element. Play It Koi offers free shipping on orders over $99. Questions? Contact our pond experts for heater sizing advice. Related Categories All Pond Heaters · Floating Heaters · Inline Heaters · Quarantine Supplies · Winter Supplies