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Fluval Marina Submersible Heater for Aquarium 100W up to 30 Gallon $9.74

$9.74
+12 Deal Score
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Was looking for a small heater for my baby swordtail frays tank and found this. Not the all-time best price but still ~ 50% off regular sale price of ~ $17. Other sizes of the same product sale for ~$20 now. According to product picture this is for up to 30 Gal / 100 L of tank.

https://www.amazon.com/gp/product/B00AFELU1O/
  • Submersible heater for fresh or saltwater aquariums or reservoirs
  • Easy to read temperature settings
  • Impact-resistant glass design; Water proof sealing
  • Includes bracket with suction cups for easy, secure installation
  • Length: 8.5 Inch

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Fluval Marina Submersible Heater for Aquarium 100W up to 30 Gallon $9.74
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Score +12
3,835 Views
$9.74
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About This Product
    Rating: (3.5 out of 5 stars)
    Reviews: 145 Amazon Reviews
    Product Name: Fluval Marina Submersible Heater for Aquarium [Standard Packaging]
    Product Description: Powerful 100-watt Marina Submersible Aquarium Heater provides reliable heating for fresh or saltwater aquariums up to 30 US gallon aquariums. The heater includes many practical features for easy use, safety and convenience, including an easy-to-access temperature set dial, on/off pilot light indicator and a bumper guard for fish safety. Made of durable high-impact glass, it's built to last under normal aquatic conditions.
    Manufacturer: Rolf C. Hagen (USA) Corp.
    Model Number: 11233
    Product SKU: B00AFELU1O
    UPC: 015561112338
    Submersible heater for fresh or saltwater aquariums or reservoirs
    Easy to read temperature settings
    Impact-resistant glass design
    Water proof sealing
    Includes bracket with suction cups for easy, secure installation
    Length - 8.5 Inch
    Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more. If you're not a student, there's also a free 1-Month Amazon Prime trial available.

    20 Comments

    1

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    This comment has been rated as unhelpful by Slickdeals users
    Joined May 2010
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    04-06-2020 at 08:54 AM #2
    Waiting for a good deal on the tanks.
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    04-06-2020 at 09:26 AM #3
    Quote from cndealking
    :
    Waiting for a good deal on the tanks.
    https://www.petco.com/shop/en/pet...allon-sale
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    04-06-2020 at 09:40 AM #4
    Quote from T23765
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    https://www.petco.com/shop/en/pet...allon-sale
    thanks but I'm looking for some modern designs.
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    04-06-2020 at 09:40 AM #5
    Quote from T23765
    :
    https://www.petco.com/shop/en/pet...allon-sale
    There was a Fluval deal from Walmart but I missed it.
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    04-06-2020 at 09:40 AM #6
    Overkill for a 10 gallon portrait tank? Plan to house a beta in there.
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    04-06-2020 at 09:42 AM #7
    Not bad. Thanks OP!
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    04-06-2020 at 09:56 AM #8
    I picked up the fluval flex 15 gallon deal, would this be a good heater or too high of wattage? In the reviews a lot of people talk about inaccurate temp settings too.
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    04-06-2020 at 10:02 AM #9
    Quote from slicknod
    :
    Overkill for a 10 gallon portrait tank? Plan to house a beta in there.
    Bigger than one really needs for a 10 gallon but not too high a wattage, it will heat the tank to a set temp but a higher wattage will simply do it faster. Also consider that a 100W is physically larger than a 50W so measure how it will fit in your tank. Also depends on how cold it gets in the room where your fish are. You need more watts to bring a tank from 60f to 75f than bringing it from 75f to 80f. That will all be on the heaters spec sheet. In any case don't trust the thermostat, always have a separate thermometer and calibrate it to that.
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    04-06-2020 at 11:29 AM #10
    I'd err on the smaller side. Common failures for heaters are power loss or faulty temperature sensor. With the former, your tank drops 10-15 degrees. With the latter you fish get hot. If you get an overpowered heater, "hot" could mean you're cooking them. E.g. 30gal heater for 5gal fry tank. Room temp will definitely play a role, too.

    I've read some people recommend 2 half power heaters to help with malfunctions, too.

    In any case a separate thermometer is a good idea to pair with any heater.
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    04-06-2020 at 12:09 PM #11
    The thermostat is a starting point, aside from that they are useless. That goes for all aquarium heaters. that dial is never correct because they are mass produced using a single spec and assume the metal used in it is precise.
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    04-06-2020 at 12:12 PM #12
    I can't speak for the 100W but I'm 0 for 5 on the 300W heaters in this line. 2 out of the box would not power on at all. 3 failed after 1-3 weeks.
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    04-06-2020 at 12:31 PM #13
    Quote from cisengineer
    :
    I can't speak for the 100W but I'm 0 for 5 on the 300W heaters in this line. 2 out of the box would not power on at all. 3 failed after 1-3 weeks.
    Wow, that is not a glowing review at all.I could really use like 9 of these for a rack. Now I'm not so hopeful.
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    04-06-2020 at 04:03 PM #14
    Quote from slicknod
    :
    Overkill for a 10 gallon portrait tank? Plan to house a beta in there.
    I'm right now using a 150w heater for my 5 gal baby tank and it still works fine, except it looks ginganic in the tank. As another SDer mentioned, as long as it does not malfunction and boil the tank water, it'll be ok for your 10 gal and my 5 gal, I believe.
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    04-06-2020 at 11:13 PM #15
    Quote from angeow
    :
    I'd err on the smaller side. Common failures for heaters are power loss or faulty temperature sensor. With the former, your tank drops 10-15 degrees. With the latter you fish get hot. If you get an overpowered heater, "hot" could mean you're cooking them. E.g. 30gal heater for 5gal fry tank. Room temp will definitely play a role, too.

    I've read some people recommend 2 half power heaters to help with malfunctions, too.

    In any case a separate thermometer is a good idea to pair with any heater.
    I agree. Go small. I had a heater failure while I was away for a few days. Came home to an aquarium at 100f.
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