Best Heater and Thermometer for Tropical Fish Tanks
Best Heater and Thermometer for Tropical Fish Tanks You usually don’t see a heater fail. It happens overnight, or while you’re at work, and the first sign is a fish breathing fast at the surface with clamped fins. I’ve been there. My first tropical tank slid from 78°F to 66°F during a February cold snap, and I lost three tetras before I understood why. The heater hadn’t stopped working, exactly. It was a 50-watt unit on a 20-gallon tank in a drafty room, and it simply couldn’t keep up. ...