Glued directly to the aquarium without any problems. I have to shine my phone on the thermometer to see the temperature, but I can read it just fine. Not sure how accurate that is, but I only have a 3 gallon tank with a rooster fish in it, so I don't feel like I have to spend any more money. I would recommend it to others for smaller aquariums and those who bought fish because they want a low maintenance pet.
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
π‘οΈ Lifegard Aquatics Digital Temperature Alert
9 Review
Thermometer RST 01077, white
21 Review
π 6 Pack AQUANEAT Aquarium Thermometer - Reptile & Fish Tank Digital Thermometer with LCD Display for Terrarium Water Temperature Test
9 Review
π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review
Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review
Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review