Just can't seem to adjust the temp. It flashes 77, but the temp stays at 75. Why?

I was having the same problem, though mine was stuck at 74.5--it stayed blue and never got higher, though it was set to 77. I called Hagen, and they said try unplugging it for 10 minutes, then plug it back in to see if that helps. It didn't; they'd said if that was the case it was defective and to return it. Mine was <1 week old.

I just bought this item September of last year and it wont let me adjust the temperature after the initial setting when I first had it

So you move the adjusting orange dial/thingy and doesn't change temp? Some times you have to move it all the way, let it return to the neutral position and the move it again to and so on. If that doesn't work, it may be faulty, contact Fluval, these have good warranty.

does this heater go in the tank

To clear any confusion, the heater is fully submersible to 39 inches. The photos in the instruction showing tank placement are misleading. The ones marked with an X means do not let it hang by the cord and do not just lay it on the bottom of the tank. Rest assured that the unit is sealed well and you are better off fully submerging the unit to prevent water evaporation from negatively affecting the heater.

Will I have "low flow" problems running only sponge filters?

Your air pump running the sponge filters circulate the water. The pump power will determine whether or not there is “low flow.”

Desertcart Logo

Q: I just bought this item September of last year and it wont let me adjust the temperature after the initial setting when I first had it

So you move the adjusting orange dial/thingy and doesn't change temp? Some times you have to move it all the way, let it return to the neutral position and the move it again to and so on. If that doesn't work, it may be faulty, contact Fluval, these have good warranty.

Q: does this heater go in the tank

To clear any confusion, the heater is fully submersible to 39 inches. The photos in the instruction showing tank placement are misleading. The ones marked with an X means do not let it hang by the cord and do not just lay it on the bottom of the tank. Rest assured that the unit is sealed well and you are better off fully submerging the unit to prevent water evaporation from negatively affecting the heater.

Q: Will I have "low flow" problems running only sponge filters?

Your air pump running the sponge filters circulate the water. The pump power will determine whether or not there is “low flow.”

Deliver to Taiwan

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🔥 Keep it cozy, keep it classy! 🌊

SAFETY FIRST - Integrated fish guard ensures a safe environment for your aquatic friends.
SLEEK AND COMPACT - Stylish black finish fits seamlessly into any aquarium setup.
ENERGY EFFICIENT DESIGN - Save on energy bills while keeping your tank cozy.
VERSATILE DISPLAY OPTIONS - Easily switch between Fahrenheit and Celsius for your convenience.
PRECISION TEMPERATURE CONTROL - Experience real-time accuracy with dual temperature sensors.

The Fluval E Heater 300W is a state-of-the-art aquarium heater designed for precision and safety. With dual temperature sensors and an LCD display, it provides real-time temperature readings in both Fahrenheit and Celsius. Its fast heat technology ensures your aquatic environment is always at the perfect temperature, while the integrated fish guard protects your fish and invertebrates. Energy-efficient and stylish, this heater is perfect for any indoor aquarium setup.

Reviews

J**S

Great heater

Great heater and super helpful to have the digital gauge on the front

13.09.2024

G**.

Bastante bueno y muy buen precio

Funciona muy bien

11.06.2024

T**A

Doppvärmare akvariet

Funkar pefekt!

14.10.2024

P**.

Ottimo riscaldatore per acquario con display chiaro e semplice

Utilizzo questo riscaldatore in parallelo ad uno più semplice in vetro.La regolazione è precisa e semplice. I colori del display permettono di capire immediatamente se la temperatura è in linea con quella impostata, inferiore o superiore!Ottimo prodotto con la calotta in plastica per proteggere da urti.

29.04.2022

E**.

Muy buenos.

Tengo varios de estos calentadores y son muy precisos. Compré el primero un poco para probar, por que no conozco a nadie que los tenga y no sabía nada de ellos.Tienen una pantalla lcd que te indica la temperatura del agua en todo momento. En azul cuando está más fría de la temperatura seleccionada, en verde cuando está a la temperatura deseada y en rojo cuando está más caliente de lo que debería. Esto aunque no lo parezca es un plus de tranquilidad, por que no es como los otros que ves la luz roja o verde si está o no trabajando, este te pone en pantalla la temperatura y lo de que te vise si por lo que sea la temperatura varía es un plus.Se pueden sumergir completamente y son muy fáciles de manejar, tienen una pestaña roja en la parte de arriba con la que subes o bajas la temperatura de medio en medio grado.Las ventosas son de las buenas, agarran mucho y bien, por ese aspecto no hay queja. El cable es bastante largo, por que que por ese lado tampoco hay problema.Vienen protegidos con una carcasa plástica para evitar que los peces se puedan arrimar y quemarse como pasa a veces con los calentadores que vienen solo con el cristal.No son baratos, pero en mi opinión es una comprá más que recomendable.

5.06.2021

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

NT$4711

Duties & taxes incl.

Taiwanstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

ChatGPT - opens in a new tab Perplexity - opens in a new tab Claude - opens in a new tab Grok - opens in a new tab Google AI - opens in a new tab

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews

Product Dimensions	4.57 x 8.38 x 46.23 cm; 371 g
Item model number	A774
Pet Life Stage	All
Flavor	Flavorless
Allergen Information	Nut Free
Color	Black
Size	E300
Volume	0.2
Quantity	1
Special Features	Energy Efficient
Specific Uses	Indoor
batteries required	No
Batteries Included	No
Voltage	230 Volts
Wattage	300 watts
Item Weight	371 g

FluvalE Heater 300W

Details

Description

Specifications

Have a Question? See What Others Asked

Reviews

Common Questions