Maintain a stable and comfortable water temperature in your aquarium with the RS-399 25W Stainless Steel Aquarium Heater. Designed for small aquariums and nano fish tanks, this compact heater helps provide consistent warmth for tropical fish and other temperature-sensitive aquatic life.

Featuring a stainless steel heating body and a compact design, the RS-399 25W is a practical choice for small aquarium setups where reliable heating and space efficiency are important.

Key Features

• • 25W Heating Power: Designed for small aquariums and nano fish tanks.

• • Stainless Steel Construction: Durable heating body designed to reduce the risk of breakage compared with conventional glass heaters.

• • Temperature Control: Helps maintain suitable aquarium water temperatures; thermostat functionality depends on the supplied version.

• • Compact Design: Fits conveniently inside smaller aquarium setups.

• • Efficient Heating: Helps maintain a comfortable environment for tropical fish.

• • Easy Installation: Designed for convenient placement inside compatible aquariums.

• • Simple Operation: A practical heating solution for everyday aquarium maintenance.

• • Suitable for Nano Tanks: Ideal for small freshwater aquarium setups when correctly sized.

Why Choose the RS-399 25W Steel Heater?

Small aquariums can experience temperature fluctuations more quickly than larger tanks. The RS-399 25W Steel Heater offers a compact heating solution to help maintain suitable water temperatures for your aquatic pets.

Its stainless steel construction provides an alternative to traditional glass heaters, while its low wattage makes it suitable for appropriately sized nano aquariums and small fish tanks.

Product Specifications

• • Brand: RS Electrical

• • Model: RS-399

• • Product Type: Stainless Steel Aquarium Heater

• • Power Consumption: 25W

• • Material: Stainless steel heating body

• • Control Type: Verify thermostat functionality for the supplied version

• • Recommended Aquarium Length: Approximately 8–12 inches, depending on tank dimensions and room temperature

• • Suitable For: Nano aquariums and small freshwater fish tanks

• • Application: Aquarium water heating

Note: The recommended aquarium size is an estimate. Actual suitability depends on water volume, aquarium height, room temperature, and the desired temperature increase.

Usage Instructions

1. 1. Position the heater securely inside the aquarium according to the manufacturer’s instructions.

1. 1. Ensure the required water level is reached before switching it on.

1. 1. Monitor the water temperature with a separate aquarium thermometer.

1. 1. Check the temperature regularly to ensure suitable conditions for your fish.

1. 1. Disconnect the power before removing or repositioning the heater.

1. 1. Allow the heater to cool before exposing it to air during maintenance.

Important: Check the supplied model’s instructions to confirm whether it requires full submersion and whether it has an adjustable or preset thermostat. Never operate the heater outside its specified water level.

RS-399 25W Stainless Steel Aquarium Heater — Compact Design, Durable Construction & Practical Heating for Small Aquariums.