hygger Mini Fish Tank Submersible Heater 50W for 5-10 Gallons Small Betta Aquarium Heater with Digital Display Controller

Best EVER heater for aquariums. I have tried 5 different brands, this being the fifth one. Call me crazy, but I'm extremely paranoid when it comes to my pets. I've read horror stories about heaters breaking, zapping fish, or overheating and cooking fish. Any time a heater has any kind of temperature issues or temperature control issues, I throw it in a box and return it. I don't play when it comes to my creatures' safety. I had three heaters, two of which were brand new, that we're heating to higher temperatures than I was setting. In addition, they would constantly turn on and off before reaching the desired temperature, taking a long time to heat up. I would have to adjust these heaters constantly depending on my room temperature, but not with this one. This heater heats quickly and doesn't burn you or any fish. I've previously touched my heaters before in the tank while they were running and got scorched. Imagine if a small fish touched that. Oh no!!! While you can buy a plastic heater guard for these traditional heaters, they cost $15-25 for each guard. Yikes! That's as much as the heater itself! This one has a plastic guard built-in with it's design already. Genius. I can touch the heater without being burned and so now I'm sure my fish and snails will not be burned. It also has a remote to make it easy to adjust the temperature without putting your hand in the water. I do notice the thermostat reads 2 degrees lower than my regular tank thermostat, so I set the water to 76F degrees and it achieves a consistent heating of 78F degrees for the tank. Although this is a minor inconvenience, the pros far outweigh the cons. Every day it's kept the tank at a consistent temperature and I don't feel scared to constantly check the temperature like how my other heaters had me checking. Love LOVE this heater and will be buying the 100w and 200w versions for my 20 gallon and 30 gallon tanks. My 50w heater here pictured is in my 10 gallon Betta tank. Read more

I’ve never left an Amazon review before, but for this product, I will. At this price point, this heater is leaps and bounds above any other heater I’ve seen available at a pet store. It’s cheaper than similar heaters I’ve purchased from Petco/PetSmart, but feels like a luxury upgrade. It’s just so well designed and functional. The built-in thermometer is awesome, its adjustability and range is awesome, its alarm for when it’s not submerged is awesome - I have nothing but good things to say. It has been efficient and reliable and great for keeping the water warm for my pea puffers. Highly recommend. Read more

It works well so far, but I've only been using it for a couple weeks, so I can't speak to its long-term durability. I found setting the temperature to be a little confusing because it didn't come with any instruction manual. I had to go back to the Amazon listing to figure out how to set the temperature. Apart from that it fits great in my 5 gallon tank, and there doesn't seem to be any leakage into the heater. I have a plastic tank and the suction cups on the heater stick very well. Read more

Works well for my 10 gal tank and my 5 gal. Holds very accurate temp. Have been using one for 2 months. 3-4-26 Read more

Small but mighty haha maintains the temperature and it takes no space in my tank 🤩 Read more

Im very happy with my 10 gallon aquarium's temperature now, and so is my betta. It works consistently and is accurate when reading the temp of the water. Was easy to set up and is still stuck to the aquarium with the suction cups that were included. Definitely worth the purchase for me. Read more

Heater was perfect for my 5 gallon Betta tank! Read more

Dont buy this heater if your water is under 54 degrees.. was trying to use this heater to warm my water that I water my plants with, 5 gallon bucket full and the heater is reading "eu" after looking through the manual it says i must get my 50 degree water to 54 before the heater will work.. you think if I had a way to warm my water I would have bought a heater??? Read more