Thermometers

A thermometer is a simple but important tool for any aquarium. It lets you keep an eye on your water temperature and make sure everything stays stable for your fish. You can go with a classic glass thermometer that sticks to the inside of the tank, or opt for a digital thermometer if you want extra accuracy and an easier read. Thermometers are especially useful if you’re running a heater, since it’s the best way to confirm the water is holding at the right temperature. Make a habit of checking it regularly—small changes can signal problems before they affect your fish.