SunSun External Heater

(2 customer reviews)

$59.98 inc. tax

  • External Heater
  • Digital Display Thermostat
  • Suitable for 12mm / 16mm / 20mm pipes
  • Easy to set up

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Purchase this item and get 5215 Points - worth $2.61
Purchase this item and get 5215 Points - worth $2.61
SKU: 6452 Category: Tags: , , ,


The EH series are heaters with thermostats that work outside the aquarium, flow heaters mounted on the outlet hose from the filter or pump. The external in line heater EH-300 from SunSun is an excellent solution to limit the amount of accessories inside the aquarium, perfect for those who require more room for scaping or for fish to swim in. 


  • Easy to connect to any type of external filter thanks to the 3 connection diameters 12, 16 and 20 (internal diameter of the hose).
  • Flow heaters do not interfere with the presence of a harmoniously arranged aquarium.
  • Wide temperature adjustment range from 20 ° C to 35 ° C, with a tolerance of +/- 0.5 ° C
  • Range adjustable every 0.5 ° C
  • Has a heater operation indicator.
  • The LCD display installed shows the temperature in the aquarium.
  • The heater has a safety device preventing overheating and switching off the heater in the absence of water flow.

Comes with a NZ plug adapter.


Additional information

Weight 0.3 kg
Dimensions 10 × 5 × 10 cm

300w, 500w

2 reviews for SunSun External Heater

  1. nesha.stojkovic (verified owner)

    From 2 intank heaters to one inline.I bought 300w for my tank(300l).So far so good.Hose connections are strong so,zero chance for hose to went off.inside diamter is same as hose diameter and no slowing down water flow rate.

  2. Jordan King (verified owner)

    Great external heater. Responds quickly to the change in water temp. Tank is less than a degree off the heaters temp.

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