Penn-Plax’s top 3 aquarium heaters for your fish tank

The aquarium industry is a huge market that continues to grow and expand. As more people become interested in the hobby, the number of aquariums that need to be purchased is rising. The good news is that you can find a variety of options when it comes to aquarium heaters. Aquarium heaters are great for heating up your fish tanks and keeping them at a comfortable temperature. 

But if you’re looking for the best aquarium heater, you can’t go wrong with Penn-Plax. Penn-Plax is the world’s leading manufacturer of aquarium heaters and it has been since its inception in 1946. Penn-Plax aquarium heaters are available in a wide range of sizes and styles. So, which Penn-Plax aquarium heater should you buy?

A Quick Look at the top 3 aquarium heaters

Product Image

Product Name




Penn-Plax Cascade Heat Aquarium Heater

200 Watt

Penn-Plax Warm Tone LED Aquarium Heater

500 Watt

Penn-Plax Cascade Mini Fish Tank Heater

25 Watt

Top 3 Best Aquarium Heater Review

1. Penn-Plax Cascade Heat Aquarium Heater – 200 Watt

Penn-Plax Cascade Heat Aquarium Heater - 200 Watt

If you are looking for a quality aquarium heater that will help to maintain the proper water temperature for your aquarium, then you should consider the Penn-Plax Cascade Heat Aquarium Heater. It is a fully submersible aquarium heater that has a capacity of 200 Watts.

This aquarium heater comes with a red control knob that allows you to adjust the temperature of your aquarium from 68 ℉ to 89 ℉.

Cascade heaters come with an automatic shutoff timer. This means that the heater will turn off after a set amount of time. This is great for people who are away from home and don’t want to be bothered by the heater. If you are using this heater for the first time, you may want to wait a few minutes to allow the thermostat to warm up and stabilize before you start heating your aquarium.

Some important features

These fully submersible aquarium heaters can be placed either horizontally or vertically.
There’s also a built-in minimum water level indicator at the top, colored in red.
Suction Cup Diameter = 1.25”
Wattage = 200W / Voltage = 110V

2. Penn-Plax Warm Tone LED Aquarium Heater – 500 Watt

Penn-Plax Warm Tone LED Aquarium Heater

The Warm Tone LED Aquarium Heater uses a unique submersible design that allows it to be placed directly in the aquarium, eliminating the need for a separate heater box. This feature is perfect for smaller aquariums or those with limited space.

The Warm Tone LED Aquarium Heater is a good choice for the aquarium hobbyist who wants to provide a safe and reliable environment for their fish.

The Warm Tone LED Aquarium Heater has a built-in thermometer that will tell you the current water temperature in your tank, and the power output is adjustable, so you can adjust the light to get the desired water temperature. The heater is made with a special type of tubing that allows the heater to be placed in any position and still maintain the desired temperature. The heater has a low wattage output and is easy to use.

Some important features

Do not operate heater outside of aquarium, and never submerse a hot heater into an aquarium – only submerse a cool heater..
After placing the heater into your aquarium, wait 15 minutes before turning on. This allows the thermostat to adjust itself to water temperature.
Suction Cup Diameter = 1.5” / Wattage = 500W / Voltage = 120V

3. Penn-Plax Cascade Mini Fish Tank Heater – 25 Watt

The Cascade Mini is a great option for those looking for a low-profile aquarium heater that is easy to install and maintain. The heater will not affect the water quality or color of your aquarium, and it is suitable for saltwater aquariums.

The heater is made of high quality, all-plastic construction, and is guaranteed to last for years. 

It is a full submersible heater, which means that the heater is completely submerged in the tank, keeping the heater out of harm’s way. The Cascade Mini Tank Heater has a built-in thermostat to maintain the water temperature within the tank, and the heater is equipped with a temperature probe to monitor the water temperature. 

Some important features

Always ensure that the unit is positioned in an area of high flow to ensure efficient heating.
Ambient room conditions can affect the efficiency of any heater as well.
Overall Length = 6” / Wattage = 25W / Voltage = 120V


The Penn-Plax aquarium heater is designed to be used with all types of fish tanks. The heater has a built-in thermostat, which controls the temperature. The thermostat will automatically turn on when the temperature drops below 72°F. The heater is also equipped with an automatic shut-off feature, which will turn off the heater when the temperature reaches 84°F. 

The heater is also equipped with a timer, which allows you to set the time for the heater to turn on and off. The timer will start counting down from 60 minutes, and will stop when the temperature reaches 80°F. In conclusion, the best Penn-Plax aquarium heater is the one that you can use to keep your fish healthy and happy.