Aquatop Submersible Aquarium Heater with Protective Guard 100 Watt SW Calcium (Ca) The cover has an opening

The cover has an opening for breathing and easy access to fish

Ideal for illumination of fountains

Inlet    3/4" FPT

Natural seawater includes over 70 chemical elements and although most of the elements influence the water parameters

One cylinder should be removed at a time to avoid crickets escaping

Aquatop Submersible Aquarium Heater with Protective Guard 100 Watt SW Calcium (Ca) The cover has an openingThe HTG Series is Aquatop's premier line of fully submersible glass heaters with thermostat control. The HTG heaters offer a compact design for versatile placement and are extra durable due to the built in glass element. The thermostat control makes it simple and easy to adjust the temperature setting and the sturdy guard helps to protect the glass heater from accidental breakage from large fish or turtles.. Aquatop's HTG Series is suitable for both