Fluval Submersible Glass Aquarium Heater, 50-watt
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Keep your fish happy, healthy and swimming in comfort with the Fluval Submersible Glass Aquarium Heater. This sleek and compact submersible heater provides exceptional performance and unsurpassed reliability in both fresh and saltwater tanks. Made from high-density ceramic, the heating element is encased in shock-resistant borosilicate glass and features a temperature range of 68-86 degrees F. To help maintain the aesthetics of your aquatic display, the unique reflective technology of the outer casing makes the heater virtually invisible in your tank. For your convenience, dual suction cups allow you to easily install it inside your aquarium.
Key Benefits- Sleek and compact submersible heater provides exceptional performance and unsurpassed reliability.
- High-density ceramic heating element is encased in shock-resistant borosilicate glass.
- Temperature can be set between 68 and 86 degrees F; suitable for up to 15-gallon fresh or saltwater tanks.
- Unique reflective technology of the outer casing makes the heater virtually invisible in your tank.
- The included dual suction cups allow you to easily install the heater inside your aquarium.
Water level should not rise above the maximum water line or below the minimum indicated on the glass heater tube. Always maintain the water level in the aquarium to compensate for water loss due to evaporation.
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Item Number124981
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Dimensions11 x 1 x 1 inches
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Weight9.92 ounces
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Aquarium TypeFreshwater, Saltwater
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Fish TypeTropical Freshwater, Betta, Cichlid, Goldfish, Marine Fish
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MaterialPlastic
It is recommended to fill the aquarium with water that is close to the desired temperature you are trying to achieve. The aquarium heater must be positioned to allow for free circulation of water around the glass heater tube. Generally, the heater should be placed at the rear of the aquarium, preferably close to a source of water movement to ensure even and thorough distribution of warmed water. Be sure there are no rocks, decorations or gravel obstructions touching the heater to create uneven heat in the glass tube and weaken it.
1) Select the appropriate temperature by adjusting the Temperature Dial to the appropriate degree calibration.
2) Position the heater in the aquarium with the heater mounting bracket attached. Press suction cups firmly against glass to adhere to the aquarium wall. Wait 30 minutes before connecting to the electrical outlet. This allows the heater to adjust to the aquarium water temperature.
3) Note that it may take up to 12 hours for the heater to attain the water temperature you have selected. It is only after this time that the Easy-Set Temperature Dial should be adjusted to achieve a higher or lower temperature, as required.
4) The unit heats only when the pilot light is illuminated. When the pre-selected temperature is reached, the pilot light shuts off. It will light again only when the heater is required to maintain the temperature at the selected level.
5) The temperature should be verified with an accurate thermometer after the heater has reached the desired temperature, before any fish are added to the aquarium, and throughout the life of the aquarium.
Customer Reviews
80% Recommend
80% of reviewersrecommend this product
You've Already Reviewed This Item
25 Reviews
Showing 1-10 of 25 Reviews
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Great Heater
By Nano5 on Dec 20, 2021
Pretty nice heater. I was sceptical about the glass cover but it does look nicer I think than plain black. The picture does not do it justice. I have it in a 5 gallon nano so no, it does not fit in the filter area if you keep the sponge. But it is fully submersible so you can put it like mine in the tank. The downsize is it is visible, the upside is it has no issue at all keeping temp. The smaller size ones might
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Excellant!!!!
By Brendaboo on Jan 18, 2022
I have a 6 gallon tank at my office that I got a preset heater for. My beta on the weekends when I wasn’t there the tank would get slight chilly for a betas liking. This one is preset to 80 and he is warm even on the weekends!
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Fluval heater
By Bill on Oct 21, 2021
Very satisfied. Heaters can be hit or miss but this one is working, Only 3 weeks, like it should. I am hoping this one lasts for years like the other Fluval heaters I own.
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Fluval Heater
By Samantha on Nov 7, 2021
I bought this for my beta tank, I set it up and everything and it doesn’t work. I don’t even think it heated up at all
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What’s to big for my tank
By Candel on Sep 6, 2021
Was to big for my tank trying to send the water heater back but the box came with no return label. Unnecessary frustration !!!!!
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Great little tank heater
By LisainNM on Mar 15, 2021
I have 3 bettas and was using the tetra brand heaters which work fine. However one of my betta tanks sit in our sunroom and in the winter at night that room is the coldest in the house and the tetra brand heater could not keep the tank up to temp. When I would wake up the tank temp would be 74 degrees and with a +/- 1 variation I was not happy with the temp being at the low end of acceptable temps. So I decided to give this little heater a try and I am glad I did! I set this heater on 80 and the tank has been 79 degrees ever since. With a +/- of 1 on the tank thermometer (I have digital probes in tank) this is acceptable and I am very happy with this purchase! I just ordered 2 more to have I have 3 bettas and was using the tetra brand heaters which work fine. However one of my betta tanks sit in our sunroom and in the winter at night that room is the coldest in the house and the tetra brand heater could not keep the tank up to temp. When I would wake up the tank temp would be 74 degrees and with a +/- 1 variation I was not happy with the temp being at the low end of acceptable temps. So I decided to give this little heater a try and I am glad I did! I set this heater on 80 and the tank has been 79 degrees ever since. With a +/- of 1 on the tank thermometer (I have digital probes in tank) this is acceptable and I am very happy with this purchase! I just ordered 2 more to have on hand to replace the other 2 when needed. … more
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Fish tank heater
By Honey on Jan 17, 2021
This is probably my favorite addition to my tank. Its modern its elegant and highly accommodating with multiple ways to position. Its a little confusing at first and does take a day or so to sufficiently do its job in my 3 gallon tank. It lights up a soft blue in the middle when it feels a temperature change in the water and fine print states it has a 3 year warranty. Im in love with this product and so far has been worth every penny. My betta seems to like it too since I caught him hanging around it a few times.
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Decent heater
By DiscusMamma on Jan 28, 2021
Decent heater for the money, bought a few of these as they were needed for my breeder Discus tanks. Have tried nany other heaters and have failed within 6months. So far so good.
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went out after a few months
By angel on Apr 16, 2021
This heater went out after a few months! I guess I should have bought a backup
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This thing is to big
By massive on Feb 26, 2021
This thing is massive. Gonna try and return cause this thing is insanely large for what it is over a foot
