JOLLY plastic heaters are designed for small freshwater, marine and turtles tanks. Their plastic casing makes them durable and safe. These heaters can be placed beneath the gravel, making them a good choice for turtle or reptile tanks. JOLLY is always on when submersed. It stops working only when unplugged. The built-in thermal protection intervenes when the heater isn't under water, preventing overheating (LED light OFF even if Jolly is plugged in). Performance can vary according to the following parameters: - Quantity of water - Room temperature - Open or closed tank
