Pet Worx 25W Aquarium Heater

Keep nano aquariums stable and tropical with the Pet Worx 25W Aquarium Heater, a compact, fully submersible heater designed for reliable temperature control in small freshwater or marine tanks. The adjustable thermostat and easy‑read indicator light make dialling in the right temperature simple, helping fish, shrimp, and plants thrive. Built for everyday durability, it’s a great value pick for betta tanks, shrimp cubes, fry grow‑outs, and desktop aquascapes.

Key features

• 25W element optimised for small tanks and nano aquascapes

• Adjustable thermostat to fine‑tune tropical temperatures

• Fully submersible design with clear heating indicator light

• Suits freshwater and marine setups for flexible use

• Compact profile to minimise visual clutter inside the tank

• Reliable, beginner‑friendly operation with simple setup

Specifications

• Power: 25 watts

• Recommended tank size: up to ~10–25 litres (guideline; actual capacity depends on room temperature and target setpoint)

• Mounting: fully submersible, vertical or angled placement

• Use case: freshwater, planted, shrimp, betta, fry, and nano reef (where appropriate)

• Safety: built‑in thermostat with status indicator

Tank sizing guidance

• Cool rooms or higher target temps: aim for 10–15 L per 25W to maintain stability.

• Temperate rooms (20–22°C) to modest raises: up to ~20–25 L is typical.

• If the room is very cool or the tank is larger, consider stepping up wattage or using an insulated background.

Why stable heat matters

Consistent heat supports immune function and metabolism in tropical fish, reducing stress and improving colouration. Stable temperatures also benefit shrimp moulting cycles and plant growth, helping prevent temperature‑shock during maintenance. A dependable nano heater is one of the simplest upgrades for healthy livestock and predictable water chemistry.

How to use

• Rinse outer casing, mount near flow, and fully submerge before powering on.

• Set the thermostat to the target temperature and allow 24 hours to stabilise.

• Verify with a separate aquarium thermometer and adjust as needed.

• Unplug and cool before water changes or moving the heater; avoid air exposure while hot.

Compatibility notes

• Media: freshwater and saltwater safe.

• Livestock: bettas, tetras, rasboras, shrimp, snails, small catfish, nano reef inverts (where temperature aligns).

• Filtration: place near filter outflow for even heat distribution.