Preset Submersible Aquarium Heater at 77°F, 50W to 300W for 10- to 90-Gallon Home Fish Tanks

A preset submersible aquarium heater from KGTropicals maintains a stated target temperature of 77°F (25°C) without a separate adjustment step. Six wattage and tank-capacity combinations let aquarists match the heater to aquarium setups from 10 to 90 gallons.

Each option lists its wattage, recommended aquarium range and heater height so the appropriate configuration can be selected for the tank.

Key Features

• Electronic heater is preset to 77°F (25°C).
• Submersible format installs inside a compatible aquarium.
• Six configurations span 50W through 300W.
• Recommended tank ranges extend from 10 to 90 gallons.
• Maker states a five-year warranty for the heater line.

Specifications

• Product type: preset submersible aquarium heater
• Preset temperature: 77°F (25°C)
• 50W: 10–15 gal, 11 in high
• 100W: 20–35 gal, 11.8 in high
• 150W: 30–45 gal, 13.8 in high
• 200W: 40–60 gal, 13.8 in high
• 250W: 53–75 gal, 15.8 in high
• 300W: 65–90 gal, 15.8 in high

Select wattage from the aquarium volume and maker’s stated range, fully submerge the unit as directed and allow temperatures to stabilize before adding livestock. Use an independent aquarium thermometer and follow all electrical and placement instructions.