Home5 Watt Aquarium Heaters Top 9 Best 5 Watt Aquarium Heaters #1 Zoo Med BettaTherm Submersible Betta Bowl Heater 7.5 Watts 9.8 SCORE | Based on 198+ Verified Reviews View Detail Buy it on Amazon ✔Fits most fish or Betta bowls✔Now with Thermal Shut Off at 26 degrees Celcius More Detail+ #2 Aqueon Flat Submersible Heater 7.5 Watts 9.5 SCORE | Based on 53+ Verified Reviews View Detail Buy it on Amazon ✔7.5 Watt works best for 1 to 3 gallon fish tanks✔Note: Do NOT operate or leave product plugged in when it is outside of water✔Shatterproof construction✔Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank✔ More Detail+ #3 SunGrow Betta Heater, 10W, Fully Submersible Aquarium Heater for Small Tanks 9.3 SCORE | Based on 106+ Verified Reviews View Detail Buy it on Amazon #4 Aqueon Mini Aquarium Heater, 10 Watts, Up to 5 Gallons 9.0 SCORE | Based on 469+ Verified Reviews View Detail Buy it on Amazon ✔Thermal safety shut-off✔Shatterproof and nearly indestructible✔ More Detail+ #5 Aqueon Fish Tank Mini Heater, 10-watt, Plastic 8.4 SCORE | Based on 167+ Verified Reviews View Detail Buy it on Amazon ✔Features thermal safety shut-off✔Perfect size heater for Aqeuon Mini Bows and other small aquariums More Detail+ #6 SunGrow Halfmoon Betta Heater, 10 Watts, for Small Tanks, Fully Submersible 8.2 SCORE | Based on 122+ Verified Reviews View Detail Buy it on Amazon ✔✔ FULLY SUBMERSIBLE WATER HEATER--- This 10-watt aquarium heater supports 1.5 gallons (5 liters) fish tank. Its exterior is designed tougher than glass and the sealed polymer can be submerged into your tank. The heating element is surrounded by thick plastic to ensure the protection of your fish. More Detail+ #7 Aqueon Submersible Aquatic Flat Heater 15 Watts 7.9 SCORE | Based on 175+ Verified Reviews View Detail Buy it on Amazon ✔15 watt is best for 4 to 10 gallon fish tanks✔Note: Do NOT operate or leave product plugged in when it is outside of water✔Shatterproof construction✔Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank✔ More Detail+ #8 ZEETOON 25W Aquarium Heater, Automatic Thermostat Betta Fish Tank Heaters, Tortoise 7.5 SCORE | Based on 263+ Verified Reviews View Detail Buy it on Amazon #9 Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt 7.3 SCORE | Based on 92+ Verified Reviews View Detail Buy it on Amazon ✔Please read all label information upon delivery. DO NOT plug heater into an electrical outlet until it is placed inside the aquarium.✔Ideal for aquariums between 2 to 10 gallons with hoods or glass canopies✔All Tetra HT heaters have indicator lights to let you know when the heater is on. It will be red when heating and green when the proper temperature has been reached. More Detail+ Recommended Categories related to 5 Watt Aquarium Heaters Hunter Sprin... Zumba DVDs Electric Dir... 4 Wheel Shop... Hp Bluetooth...