Over the decades with many aquariums I have tried many brands of heaters and every time the heater kept failing I have this brand with an "X" next to it. This list of failed heater brands is long, with only one brand ever failing: Aqueon Pro. They're more expensive, but they're the best. You pay a lot when you buy an Aqueon heater, so pay a little more when you buy to get the Aqueon Pro. The Aqueon Pro is more durable because it has an aluminum tube instead of the Aqueon Non-Pro glass tube. Glass tubes break because their rubber mounts melt on them, and glass tubes break when the temperature changes too quickly.
YukiHalu Mini Submersible Aquarium Heater With Thermometer And Temperature Controller - 25W, 50W, 100W, Or 200W Options For 5-40 Gallon Fish Tanks
25 Review
Faucet water heater with display
13 Review
π Fluval E300 Electronic Heater - 300W Advanced Aquarium Heater for Tanks up to 100 Gallons (A774)
9 Review
Accumulative electric water heater Thermex Ceramik 50 V, white
11 Review
Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review
Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review
Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review