As others have said, it seems to be 10 degrees off (82=72). Once you figure out how to compensate for this, you're good to go. The suction cups are also average (one sticks, the other doesn't), but the one that works seems to hold it in place. For the price, it's probably closer to 3.5 stars than 3, but such a large variance in temperature can definitely be an issue. Hope this review helped.
π Fluval E300 Electronic Heater - 300W Advanced Aquarium Heater for Tanks up to 100 Gallons (A774)
9 Review
Convector Electrolux ECH/T-2000 M, white
21 Review
Sectional radiator Royal Thermo PianoForte 500, number of sections: 10, 11.7 m2, 1170 W, 800 mm.
31 Review
YukiHalu Mini Submersible Aquarium Heater With Thermometer And Temperature Controller - 25W, 50W, 100W, Or 200W Options For 5-40 Gallon Fish Tanks
25 Review
Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 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
Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review