The Periha Aqua Heater HE Series is a dependable and fully submersible heater designed to maintain precise and consistent water temperature in your aquarium. Available in wattages from 50W to 300W, these heaters are suitable for both freshwater and saltwater setups. Key advantages include: a robust Quartz Tube design for high resistance and safety, precise temperature control simplified by an indicator scale, and an auto-on/off thermostat maintaining your set temperature between $22^{\circ }\text{C}-34^{\circ }\text{C}$. Each unit includes a protective plastic guard for enhanced safety.