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Hagen Fluval E 300 Watt Aquarium Heater
Hagen Fluval E 300 Watt Aquarium Heater

Hagen Fluval E 300 Watt Aquarium Heater

Item #: 015561107747
Reg: $84.99
Sale: $66.99
You Save: $18.00 (21%)
  • Description
  • Video
  • Reviews
Fluval E Aquarium Heaters are simply the most technologically advanced heaters available today. The Fluval E series advanced electronic aquarium heater with VueTech technology delivers peace of mind by continuously displaying real time water temperature. Equipped with an advanced digital microprocessor monitoring system with dual temperature sensors, the E series continuously monitors and displays aquarium water temperature, ensuring the well-being of your aquarium inhabitants. During normal operation the temperature readout will change color if the aquarium water varies +/-1 degree C or +/-2 degree F or more from the pre-set temperature. Fully submersible. For aquariums up to 100 US. gal (375L) and can be used in fresh and saltwater tanks. 13" long.


  • Electronic Technology
    With advanced electronic technology the Fluval E Series is unmatched in precision, reliability and safety.
  • Precise Temperature Setting
    With the easy to use adjustment lever the temperature can be precisely set in 0.5 degree increments.
  • Advanced Safety
    The integrated fish guard offers advanced protection. Fish and invertebrates cannot come into direct contact with the heater core. The heater is protected against shocks from large fish species.
  • Mounting Bracket
    The heater easily clips on of off of the slim line mounting bracket or can be vertically adjusted for precise placement. The included adaptor provides the option of side glass mounting when traditional rear glass mounting is not possible.

View Instructions Manual

Review Summary
9 Reviews
89% (8)
0% (0)
11% (1)
0% (0)
0% (0)
100% Recommend this product (9 of 9 responses)
By Anonymous
Great heater for aquatic turtle tank
October 22, 2021
Very happy with the purchase. The heater maintains temperature accurately and is well designed.
By Garry R.
Great Product!!! Great Service!!!
June 4, 2021
Super Fast Shipping!!!
By Al
Great product, better service
March 26, 2021
Petguys advised me via email of product availability. Ordered and shipped the next day. Heater is easy to setup and read display in the aquarium.
  • Shipped fast.
  • Easy set up.
  • Legible display.
  • None so far.
By Steph
Excellent Heater
February 22, 2021
I love this heater! Just got my tank through the Tx snowstorm week:) I did need to watch the fluval utube video about operation and troubleshooting tips as I needed to reset it but Fluval has a nice video to help with that. I highly recommend this heater and Petguys was awesome in getting it to me along with a E 300 that they sent me later after a stocking glitch.

So great heater, but better yet, PetGuys is a great online supplier who stands behind what they sell and how they sell to their customers and how to professionally deal with on online order "glitch" and make it right for me.

Love Fluval products (use their canister filters) and love PetGuys too!!!!
  • Works great!
  • Submersible
  • Heater guard for fish
  • Love the fact that it gives temp digitally so I can see it in tank
  • Love the use of colors to tell me if it is at temp, heating up
  • Has Utube videos (by Fluval) to help with troubleshooting and general info.
  • I personally needed to watch the utube video as the instructions that came with it were not so helpful.
By Jay P.
good transaction
February 7, 2021
the transaction was a good one-- good price, good packaging, and prompt delivery
  • good price, good packaging, and prompt delivery
  • none
By Joel
Excellent price but lousy packing for shipping!
December 20, 2017
I order 2 aquarium heaters and they threw them in a plastic bag roll it up stuck in mail. Received in beat up condition for a fragile piece of equipment!
By John M.
September 30, 2017
Works perfectly. Maintains a perfect temperature.
  • Fully submersible.
  • None.
By Danny
Heater is great, the customer service was even better!
March 4, 2016
As usual Fluval has made a great product that sells for a descent price. The heater works well and looks cool, but when I first received it, the top tab was broken. I called petguys and they mailed me a new one immediately along with return postage. It's hard to find customer service like that these days. Petguys has earned my business for sure.
By Don
North Las Vegas, NV
Works Great
February 28, 2014
I purchased this as a replacement for another brand. It arrived on time and as described. It is well protected from my aggressive silver arowana.
  • idiot-proof temperature indicator, easy to read, telltale colors
  • a detachable display would be nice