Heating & Lighting Accessories

Fish Tank Thermometers and Timers

Whether you want to set your aquarium lights to come on and go off at specific times or you just want to keep track of the water temperature, we can help. At PetSmart, we carry thermometers that measure the temperature of your fish tank, allowing you to continually monitor for sensitive species of fish and coral. Find floating analog thermometers, submersible holders, digital fish tank temperature readers with movable probes and the classic aquarium strip online or in-store. With easy-to-use fish tank light timers and digital power centers for heating and accent features, plus accurate thermometers, you can light your fish tank and monitor its temperature constantly. Explore our collection – and find the right solution for your fish, your tank and your life.