Hydor Inline Heater Size:300w Features a patented refiltration control

Features a patented refiltration control system that lets you slow down the water output

thus ensuring optimal air exchange for the chiller and heat output from the cabinet

Calibration

plus frozen or live foods (brine shrimp

Unlike other ionic calcium supplements

Hydor Inline Heater Size:300w Features a patented refiltration controlFirst and unique external heater for aquariums with the exclusive PTC (Positive Thermal Coefficient) technology. The self limiting PTC heating element guarantees maximum safety against any risk of overheating. The exclusive technology and the high quality of the components guarantee a long lasting product. Suitable for canister filters and sump tanks. To suit 16mm tubing.