The Ista External Heater 500W is a premium inline aquarium heater designed for large aquariums up to 500 litres. By connecting directly to your canister filter’s return hose, it removes bulky heating equipment from inside the tank, resulting in a cleaner and safer aquascape.

Technical Specifications:

• Power Output: 500 Watts
• Recommended Tank Volume: 250L to 500L (best suited for 300L planted tanks or 250L high-temperature setups like Discus tanks).
• Hose Compatibility: Fits standard 16/22 mm canister filter tubing.
• Heating Element: Advanced thermal spraying glass that accelerates heat transfer and improves energy efficiency.

Key Features & Benefits:

• Clutter-Free Aquascape: Keeps your tank clear of unsightly equipment, which is perfect for dedicated aquascapers and planted setups.
• Dual-Sensor Monitoring: Equipped with two precision sensors at the water inlet and outlet to continuously track temperatures.
• Dual-Line Digital Display: Simultaneously displays the target set temperature and the live, real-time water temperature.
• Advanced Multi-Safety Protections. The auto power-off system shuts the unit down if:
  • Water flow stops or the heater runs dry.
  • Water temperature exceeds 36°C.
  • A temperature difference greater than 5°C is detected between the two sensors.
  • The actual temperature fluctuates more than 3°C from your set target.

Critical Installation Guidelines:

• Strictly Vertical Alignment: The heater must be installed vertically to operate safely and correctly.
• Placement: Cut your filter’s return/output hose (the line carrying clean water back to the tank) and clamp both sides firmly onto the heater junctions. Placing it after the filter ensures clean water passes through, drastically reducing debris buildup and maintenance.
• Weight Support: Most canister filter hoses cannot bear the weight of an external heater. Use the built-in mounting loop to secure the device to your cabinet wall, preventing strain on your plumbing assemblies.