Hydor heating external ETH
Suitable for all external pot filters. Completely safe. No risk of damage if the device runs dry for a short time. Patented heating element made with the exclusive PTC system. The traditional metal heating coils have been replaced by a special polymer foil, covered with a thin layer of heating ink. Temperature setting controlled by an electronic circuit with indicator light. Hose pillars are suitable for every type of flexible hose from all external filters.