Ultra Heater D&N 50W – aquarium heater

This 50 W heater is aimed at hobbyists keeping fish or other aquarium animals in tanks of 15–50 l who want stable water temperature without a bulky unit. Its electronic thermostat holds the set temperature within ±0.25°C, and the day/night function lets the water temperature follow a cooler night and warmer day.

Why it matters

• Day/night (D&N) function: the heater lowers the temperature at night and raises it during the day, reproducing a natural daily cycle in the tank.
• Precise control: the electronic thermostat maintains a stable setpoint within ±0.25°C, which is relevant for sensitive species.
• One-touch adjustment: a single button and an LED ring show both the current and the programmed temperature, so settings can be checked at a glance.
• Built-in overheat protection: a thermal cut-out switches the heater off to prevent overheating, and the system also limits water temperature during hot periods.

Specifications

• Brand: Aquael
• Model: Ultra Heater D&N 50W
• SKU: PPP GRZALKA ULTRA HEATER D&N 50W
• EAN: 5905546335928
• Power: 50 W
• Tank volume: 15–50 l
• Temperature range: 20–33°C
• Length: 16.3 cm
• Weight: 0.25 kg

What it works with

The heater is listed for freshwater and marine aquariums, as well as paludariums, aquaterrariums and terrarium pools. Its 15–50 l tank range and 20–33°C setting range make it suitable for smaller setups where a compact, low-profile unit is needed. The supplier notes that the housing is shatter-resistant and suited to larger, robust fish and water turtles.