Amazon.com: AQUANEAT 1 Pack Aquarium Thermometer, Reptile Thermometer, Fish Tank Thermometer, Digital Thermometer, Terrarium Water Temperature Test, with Large LCD Display : Pet Supplies
Aquarium Masters Smart Temp Digital Heater 300 watt – KensFish.com
AQUATOP TH-800 and DDC-800 Titanium 800W Heater and Dual Display Digital Controller Combo Kit