Ultra Heater D&N 75W – aquarium heater

This 75 W heater is intended for hobbyists with tanks of 35–75 L who want stable water temperature and a heater that stays out of sight. It is rated for freshwater and marine aquariums, and the manufacturer also lists paludariums, aquaterrariums and terrarium pools as suitable setups.

Why it matters

• Day-and-night mode: The D&N function adjusts the water temperature automatically, cooler at night and warmer during the day, which reproduces a natural daily cycle.
• Precise control: The electronic thermostat holds the set temperature within ±0.25°C, and the 20–33°C range covers both typical tropical settings and temporary temperature changes used during treatment.
• Simple adjustment: A single ONE-TOUCH button and an LED ring show both the current and the programmed temperature, so changes can be made without a separate display.
• Protection: A built-in thermal cutoff guards against overheating, and the housing is unbreakable, which matters where large or powerful fish or turtles can knock the heater.

Specifications

• Power: 75 W
• Tank volume: 35–75 L
• Temperature range: 20–33°C
• Length: 20.8 cm
• Temperature precision: ±0.25°C
• Mounting: double-sided hanger

What it works with

The heater is designed for 35–75 L tanks and can be used in freshwater, marine, paludarium and aquaterrarium setups. The manufacturer notes that it is safe for sensitive species such as corydoras and stingrays and can also be used in larger tanks with strong fish or turtles. Its flat profile keeps it discreet against the background and leaves the view of the tank clear.