ThermaKoi Electrical Heaters from GCTek
ThermaKoi Electrical Heaters from GCTek
1.5kW through 11kW Models (Analog Control Options)1.5kW through 11kW Models (Digital Control Options)18kW Model
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During the cold winter, Koi stop eating and live off their fat reserves, lowering their immune system. As the water begins to warm up, bacteria become active, and Koi can be in trouble. Keep your Koi strong all winter by heating your pond, keeping your Koi feeding consistently.

In the past, it hasn't been easy to heat Koi ponds -- it has meant running gas lines or propane lines out to the pond. Now with the ThermaKoi Heaters, you can have pond heating wherever you have electricity! Made of 316 stainless steel and utilizing highly accurate electronic thermostats, these units keep water temperature precisely controlled.
  • Installes easily and quickly -- plumb in line with included 2" slip unions
  • Overload protected and built to last
Heaters come by default with analog controls. For an additional $126, heaters can come with a digital display.

Model Wattage Max Pond Size Power Cord Type
ThermaKoi 1.5 1.5 kW 500 gallons 115V plug with GFCI
ThermaKoi 6 6 kW 6,000 gallons 230V hardwired with junction box
ThermaKoi 11 11 kW 11,000 gallons 230V hardwired with junction box
ThermaKoi 18 18 kW 18,000 gallons 230V hardwired with junction box
GC Tek GCTek Therma Koi
GC Tek products are not eligible for order discounts. Adding GC Tek products to your order will void coupons used on that order.
Specifications
Body Material 316 Stainles sSteel
Union Size 2"