
We bought this thermometer for use in a 40 gallon aquarium for a small teju. It can measure temperature in C and F and humidity in percent. You can either stick it to the glass with the included stick or attach it with a plastic hook. It's fairly accurate, but since it doesn't have probes it can only measure right around the device, which isn't as useful for measuring substrate or bathing areas in the middle of the cage. But it's cheap enough that you can buy multiple units to measure different areas in a larger setup.

capetsma Reptile Thermometer: Accurate and Easy-to-Read Digital Hygrometer for Reptile Terrariums - Temperature and Humidity Monitor in Acrylic and Glass Terrariums (1 Pack)
8 Review

๐ 6 Pack AQUANEAT Aquarium Thermometer - Reptile & Fish Tank Digital Thermometer with LCD Display for Terrarium Water Temperature Test
9 Review

๐ก๏ธ Qooltek Digital LCD Thermometer Gauge with Probe for Vehicle Reptile Terrarium Fish Tank Refrigerator - Fahrenheit Aquarium Temperature Sensor
8 Review

๐ก๏ธ Accurate Water Temperature Monitoring with DIGITEN Digital Aquarium Thermometer for Reptiles, Turtles, and Amphibians
8 Review

๐งฒ Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
34 Review

Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review

Greenpro Micranthemum Monte Carlo: Live Large Pearl Grass Aquatic Plant In Tissue Culture Cup For Freshwater Fish Tanks And Aquariums
49 Review

๐ U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review