GCTek ThermaKoi Heater for Koi Ponds
The GCTek ThermaKoi Pond Heater is an inline electric heater made of heavy 316 stainless steel. Water simply flows in one 2″ union fitting and out the other. Flow switches come standard for reliability, and an electronic thermostat with a digital LED readout gives precise temperature control. There is no gas or propane line to run, which makes it an easy way to heat your koi and the perfect solution for the KHV heating protocol.
• Four Sizes: 1.5 kW, 5.5 kW, 11 kW and 18 kW.
• 115 or 230 Volt: The 1.5 kW ZH-1 plugs into a standard 115 volt outlet. The 230 volt ZH-6, ZH-11 and ZH-18 are hardwired into the built in junction box.
• Digital LED Readout: Every ThermaKoi is now a digital LED readout unit with an electronic thermostat.
• Flow Switch Standard: Built in flow switch on every model for reliable operation.
• 316 Stainless Steel: Heavy stainless construction made for life outdoors at the pond.
• Made for KHV Protocol: Raise and hold water temperature when your koi need it.
Which ThermaKoi Pond Heater By GCTek Do I Need?
ThermaKoi ZH-1 (115 Volt)
1.5 kW on a standard 115 volt outlet. The simple choice for small ponds, quarantine and hospital tanks.
ThermaKoi ZH-6, ZH-11 and ZH-18 (230 Volt)
5.5 kW, 11 kW and 18 kW on 230 volts, hardwired into the built in junction box. All share the new black cabinet.
ThermaKoi Pond Heater Sizing
| Model | Power | Voltage | Display | Connections |
| ZH-1 | 1.5 kW | 115 V | Digital LED | 2″ unions |
| ZH-6 | 5.5 kW | 230 V | Digital LED | 2″ unions |
| ZH-11 | 11 kW | 230 V | Digital LED | 2″ unions |
| ZH-18 | 18 kW | 230 V | Digital LED | 2″ unions |
The right size depends on your pond volume, how cold it gets and how warm you want the water. Contact us and we will help you size it.
Features on Every ThermaKoi Heater
- Heavy 316 stainless steel heater
- Electronic thermostat with digital LED readout
- Flow switch, standard on every model
- 2″ union fittings on the inlet and outlet
- Built in junction box for hardwiring on the 230 volt models
Before You Order a ThermaKoi Pond Heater
- Check your power. The ZH-1 needs a 115 volt outlet. The ZH-6, ZH-11 and ZH-18 need a 230 volt supply and should be hardwired by a licensed electrician.
- Plumb it inline so pond water flows through it, in one 2″ fitting and out the other.
- ThermaKoi heaters are now digital only. The older analog dial version is no longer offered.
- Contact us with your pond size, your coldest winter temperature and the water temperature you want to hold, and we will help you choose the right size.
- FREE Shipping via FEDEX, LTL Ground, & UPS. Ships in 2-3 Business Days.
- Ships Only to Lower 48 States of the United States
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