I recommend getting a couple of extra heaters so you don't have to get nervous waiting for the new ones to arrive when the old ones fail.
Faucet water heater with display
13 Review
Accumulative electric water heater Thermex Ceramik 50 V, white
11 Review
Hardy Leaf Black Forest Asian Java Fern Potted Live Water Aquatic Aquarium Plants For Freshwater Fish Tank By Greenpro Microsorum Pteropus
39 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
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review
𧲠Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
34 Review