sera delta heater

Shock resistant heater thermostats in particularly slender shape and with protection against overheating

The sera delta heater thermostats are made of shock resistant glass and hardly consume space in the aquarium due to their slender shape. The adjustment range of the heater thermostats is between 18 and 32°C (64 – 90°F). The protection against overheating provides additional safety. It switches off automatically if the heater heats up outside the water. The clearly visible status display shows the operational status in 3 colors: green (temperature OK), red (heating), violet (protection against overheating is on).

The extra long 1.8 meter (6 ft.) cable makes installation easier and allows forming a drip loop.

The GS-mark indicates that the product and the accompanying manual have been tested for safety and production is monitored regularly.

How to choose the correct heater:

Δ T = water temperature - room temperature

Aquarium size

  Liters 25 50 75 100 150 200 250 300
  US gal. 6 13 20 26 40 53 66 80
ΔT 5°C
25 W 50 W 50 W 100 W 100 W 150 W 200 W 300 W
ΔT 10°C
25 W 50 W 100 W 100 W 150 W 200 W 300 W 300 W
ΔT 15°C
100 W 100 W 150 W 200 W 300 W 2x
200 W
300 W
300 W

sera guide booklets

Browse our extensive guide booklets. From the first steps via correct feeding up to health related topics ...

sera guide booklets