Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 7-in

By Penn-Plax
Rated 4.1429 out of 5 stars


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$24.99Chewy Price
$28.99Chewy Price
In Stock
FREE 1-3 day delivery on first-time orders over $35

About This Item


  • Designed to maintain tank temperature within 1 degree of accuracy.
  • Features both Fahrenheit and Celsius temperatures on an easy-to-read gauge.
  • Heater is fully submersible, and it can be placed horizontally or vertically in your tank via dual suction cups.
  • Comes preset to 76 degrees Fahrenheit, but it can be manually reprogrammed to any temperature.
  • Safe to use in both freshwater and saltwater tanks up to 5 gallons in size!

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Fish TypeTropical FreshwaterBetta, Cichlid, Goldfish, Marine Fish, Tropical FreshwaterTropical FreshwaterMarine Fish, Tropical FreshwaterTropical Freshwater
Aquarium TypeFreshwaterSaltwater, FreshwaterFreshwaterFreshwaterFreshwater
MaterialPlasticPlasticPlasticPlastic, PolypropylenePlastic

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ReviewsWrite a Review

Rated 4.1429 out of 5 stars
7 Ratings
Would recommend to a friend

7 Customer Reviews

Rated 5 out of 5 stars
By Theresa on Nov 2, 2023


Very good heater for my betta he is in a 5 gallon tank

Rated 5 out of 5 stars
By fredy214 on Aug 7, 2023


One of the best adjustable nano heater for my betta rack

Rated 1 out of 5 stars
By Amy on Aug 12, 2022

Save your money

I bought this heater for my 10 gallon and initially, it was great. Unfortunately, it stopped working already. I only keep it set around 80 F. I'm very disappointed with this heater. I've used Penn Plax products for years without a problem.

Rated 5 out of 5 stars
By bunnyga1 on May 17, 2022

Simply amazing little thing!

Works as described. I'm glad I've changed my heating element for my aquarium! So far I've ordered 2. The first one is great I love that it's submersible. The 2nd one I bought came damaged. It's no worry to me because chewy who my pets and I adore are working promptly to replace it. Besides I'm up grading. I'm grateful that I have the one I'm using and excited to upgrade. Thank you chewy for your time and patience along with your timely response I couldn't ask for anything more!

Rated 5 out of 5 stars
By Nostrils on May 8, 2022

My pup LOVED it

This isn’t what I thought it was. I thought it was a chew that would last. It’s pretty big & thick - didn’t smell. My puppy absolutely loved it - it lasted about 10 minutes. All in all it was money well spent because she LOVED it! I hope they get more as I wanted to order more, but they’re out of stock

Rated 3 out of 5 stars
By unhappy on Jul 17, 2022

not so happy

really can tell if it is working? sometimes it works and sometimes not.

Rated 5 out of 5 stars
By Marvel on Mar 2, 2022

Maintains temp adjustable heater

I am SO glad Chewy offers this product. I have gone to 3 pet stores looking for an adjustable heater for my small 5 gal aquarium, and found this one. Easy to read temp, easy to adjust temp, and maintains the temp you set it to! It is WONDERFUL.