Live Chat Support
    Free Shipping On $175+
  • FREE Shipping On $175+
  • 14-Day Low Price Guarantee
  • 14-Day Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
FREE Shipping on
Orders Over $175
Standard ground shipping (1-7 business days) starts at a low $5.99 and most orders over $175 ship FREE. Learn More
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you've purchased the item! Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 6 pm EST ship the same day! Learn More

Aquarium Heaters & Fish Tank Heaters

Azoo Titanium Heaters
Adapts the latest electronic heating control technology. Temperature control range 21~33°C , ±1°C Titanium tube body, free from acid or alkaline corrosion, suitable for both salt water and fresh water aquariums.
Cobalt Aquatics Aquarium Heaters
The Neo-Therm electronic heaters have an impressive accuracy of ±0.5ºF. The electronic thermostat has an utra-fast response time that helps to keep the temperature stable. Also available, Accu-Therm glass heaters.
Hagen Fluval E-Series Electronic Aquarium Heaters
The Fluval E series advanced electronic aquarium heater with VueTech technology continuously displays real time water temperature.
Hydor ETH In-Line External Fish Tank Heaters
Designed for external, vertical use in most aquarium applications involving the use of water hose. For use in freshwater and marine aquariums. Fits most canister filters.
Hydor Slim Heater
Supplies Continuous Safe Gentle Heat in small aquariums or bowls, approximately 5 to 10 degrees above ambient room temperature. No glass components to crack or break plus with double sealing.
Hydor THEO Submersible Aquarium Water Heaters
Highly accurate due to the use of precise micro-switch technology. UL listed by design, not by the use of accessories. For use in freshwater & marine aquariums.
Jager Heaters
New TS Series heaters are completely waterproof, submersible heaters perfect for freshwater or saltwater use. Heavy duty 2mm thick shock resistant Pyrex glass construction.
JBJ True Temp Fish Tank Heaters
+/- 0.5 F accuracy, a calibration setting, indestructible titanium heating element with thermal shut off, smart memory chip, LED heating indicator, magnetic heater/probe holders, safety guard, remote temperature probe, large constant LED display of the current temperature.
ViaAqua Aquarium Water Heaters
Glass and titanium aquarium heaters for fresh and saltwater applications. Easy to read temperature indicator and compact design are a few of the features of this heater.
Won Brothers Fish Tank Heaters
These titanium heaters are corrosion resistant, heavy duty, and very reliable. Ideal for both aquariums and ponds with sizes available up to 1500 watts.
Zoo Med MagClip® Magnetic Suction Cups
Industrial strength MAGNETIC suction cup with interchangeable clips Never replace your suction cups again!
A quality aquarium water heater is necessary if you intend to maintain a successful tropical freshwater, marine fish or reef system. Temperature fluctuations often go unnoticed by aquarists and can cause stress to fish and corals.

Most fish tank heaters include a built-in thermostat to select the optimal temperature for your aquarium, however, the use of a thermometer to monitor the temperature is highly recommended. You might consider a temperature controller for keeping a stable environment in your aquarium since they offer more precise readings and an advanced feature set.

Most aquarists opt for glass-walled heaters due to their size, price and dependability. Heaters from Jager, Hydor and Aquarium Pharmaceuticals RENA are very popular among hobbyists.

A minimum of 3-5 watts per gallon is recommended to keep aquarium temperatures at an optimal level. Aquarists with larger tanks should consider using more than one heater. In the unlikely event that your heater goes, have multiple heaters in place safeguards your tank from crashing.

This item is temporarily unavailable but will be back in stock soon.

Item #
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.

Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

Your Email:
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Your Email:
Email Specials
Subscribe to our newsletter feed.
Newsletter Tips & Tricks! New Products!
Discounts & Promos!
Dec 18, 2014
"I enjoy shopping at Marine Depot because of its selection of products and the prices are reasonable."

Dec 16, 2014
"I will be buying from Marine Depot from now on."

Dec 16, 2014
"Good website had everything I needed and easy to find."

Save Money Get our best deals, product how-tos and expert tips delivered weekly to your inbox.