Aquarium Betta Heater, Submersible Fish Tank Heater 10W/25W/50W/100W with LED Digital Display for Freshwater and Saltwater

Aquarium Betta Heater, Adjustable Submersible Fish Tank Heater with LED Digital Display for Reliable Water Temperature Control

Your fish stay comfortable in steady water. A little heater sits underwater in your betta or nano tank, keeping things consistent without you thinking about it. Before, owners worried about sudden swings or a heater running dry, but this one shuts off when water gets low.

The heater body uses thickened quartz glass built to resist cracking and corrosion underwater. It measures about 4.1 inches long, small enough to tuck into nano or betta tanks easily. A digital display shows current water temperature, while a separate controller lets you adjust settings without touching wet glass.

You can pick from four wattage options, ranging between 10 and 100 watts. Each wattage pairs with a tank size range, from 1 up to 26 gallons. Every version works in fresh or saltwater aquariums, holding a temperature range between 59 and 93 degrees Fahrenheit.

If water passes 95 degrees or drops below the safe minimum, heating stops. The controller then shows an error code, either HH for high temperature or E1 for low water. This design also fits acrylic tanks and works well for turtle habitats needing steady warmth throughout the day.

• WATTAGE OPTIONS: Choose from 10, 25, 50, or 100 watt versions, each holding a range between 59 and 93°F.
  
  
• TANK SIZE FIT: Every wattage option matches a tank size range, starting at 1 gallon and reaching up to 26 gallons.
  
  
• FRESH & SALTWATER USE: Works in freshwater or saltwater tanks, giving fish keepers one heater for either setup.
  
  
• QUARTZ GLASS BODY: Built with thickened quartz glass measuring 2mm thick, resisting cracking and corrosion during regular use.
  
  
• OVERHEAT PROTECTION: Stops heating automatically past 95°F or below minimum water level, showing HH or E1 error codes.
  
  
• COMPACT MINI SIZE: Measures only 4.1 inches long, fitting easily into nano tanks or small betta setups.
  
  
• LED DIGITAL DISPLAY: Shows current water temperature directly on the heater for quick, real time reference.
  
  
• REMOTE CONTROLLER: A separate temperature controller lets you adjust settings from outside the tank, keeping your hands dry.

SUBMERSIBLE FISH TANK HEATER SPECS

• Wattage: 10W, 25W, 50W, 100W
  
  
• Temperature Range: 59 to 93°F
  
  
• Tank Size: 1 to 26 gal
  
  
• Material: Quartz glass
  
  
• Length: 4.1 in
  
  
• Water Type: Fresh, saltwater
  
  
• Display: LED digital
  
  
• Error Codes: HH, E1

PACKAGE INCLUDES:

• 1 x Aquarium Heater
  
  
• 1 x Remote Temperature Controller