Penn-Plax Aquarium LED Display Heater, 300W

By Penn-Plax
Rated 2 out of 5 stars
$43.19Chewy Price
$54.27Chewy Price

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In Stock
FREE delivery
Arrives between Oct 03 and Oct 11

About This Item


  • This aquarium heater lets you set and maintain the ideal water temperature for your freshwater or saltwater fish.
  • Features an easy-to-read LED display for monitoring the water temperature.
  • The reliable and sensitive adjustment dial lets you change the temperature between 61 and 90 degrees Fahrenheit.
  • Fully submersible with a horizontal or vertical placement.
  • High-quality electrical components are protected by a double-sealed quartz tube.

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Fish TypeMarine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterBetta, Cichlid, Goldfish, Marine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterMarine Invertebrate, Tropical Freshwater
Aquarium TypeFreshwaterSaltwater, FreshwaterSaltwater, FreshwaterFreshwaterSaltwater, Freshwater
MaterialPlasticPlasticPlasticPlastic, PolypropylenePlastic

Questions & Answers

1 Customer Questions

will this heat a 250 gallon tank
Answer by ChewySep 30, 2020
The 300 watt size for this heater is recommended for 60-100 gallon aquariums. The 500 watt size is recommended for 100-200 gallon aquariums. The 800 watt size is recommended for 100-250 gallon aquariums.

ReviewsWrite a Review

Rated 2 out of 5 stars
4 Ratings
Would recommend to a friend

4 Customer Reviews

Rated 1 out of 5 stars
By Mollies on Jan 10, 2021

Keeps fluctuating the temp!!!

I have 7 fish tanks of various sizes. This heater is the only one I have ever had a problem with. First it was fine, but when I tried to adjust the temp by 2 degrees- it warmed up instead of cooling off. I adjusted the temp down, waited a bit and reset. It was good for a few days. Then it went up by 5 degrees!! Too hot!!!! I cleaned it, reset it. Last night it dropped the temp by 10 degrees!!!! My fish fry were almost way too cold!!! I do NOT recommend this product! I will replace with a more stable item as I do not want all my fish to die from these wild temperatures in the tank.

Rated 1 out of 5 stars
By 3647 on Nov 29, 2020

Keep Looking

Had this heater for a little over two months. Not a fan of the turn knob to set the temperature which makes it very difficult to see especially if it has to go horizontally in your tank. It always ran 2-4 degrees colder than the tank thermometer read. Started having issues one day where it would increase temperature by its self, it was set at 79, and heater read 86, thermometer read 88. Turned it off, adapted my water back to normal and made sure it was set to 78 prior to turning it back on, everything was fine. Came down the next day to the heater reading 99, and my thermometer reading 90. Disappointed it lasted a little over 2 months, maybe I got a defective one, but not willing to take another chance with my fish.

Rated 1 out of 5 stars
By Debr on Feb 7, 2021

Penn-Plax heater

I do not recommend had it for 2 months and started heating the tank up to 90 degrees

Rated 5 out of 5 stars
By Jamise on Oct 31, 2020

Penn Plax Heater

Simple and easy to use. Has maintained temp very well. I will buy again.