Penn-Plax Cascade Heat Aquarium Heater – Fully Submersible – Great for Freshwater and Saltwater Fish Tanks – 13.5” Length – 300 Watt

Price: $16.58
(as of Oct 16, 2025 11:39:51 UTC – Details)

Cascade presents the 300W LED Aquarium Heater by PENN-PLAX.
This heater easily maintains healthy water temperature within a 1° accuracy,
and can be set anywhere between 68 ℉ and 89 ℉, by using the red control knob.
Our Cascade Aquarium Heaters are factory set to 76 ℉,
and are safe for either freshwater or saltwater fish tanks.
The 300W model works great for 55 – 75 gallon tanks.Visible & Accurate Temperature Scale:
With an easy to read setting scale in both Celsius and Fahrenheit,
it’s easy to see the temperature adjustments being made.
To increase the temperature, rotate the control knob counter-clockwise,
and to decrease, rotate it clockwise;
or, follow the + and – symbols located near the control knob.
Orange Pilot Light:
Our Cascade Heat Aquarium Heaters feature a pilot light that indicates the heating cycle status.
This means that it will go on and off by itself as the thermostat cycles the heating element on and off.
In other words, orange light = heater is on.
Similarly, these aquarium heaters make a faint click when turning off.
Additional Features:
In addition to being composed of heavy-duty and shock-resistant glass,
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.
Please Note:
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.
Measurements:
Overall Length = 13.5”
Overall Diameter = 1.1”
Suction Cup Diameter = 1.25”
Wattage = 300W
Voltage = 110V
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 12 x 1.5 x 3 inches; 11.68 ounces
Item model number ‏ : ‎ CH12300
Date First Available ‏ : ‎ September 3, 2007
Manufacturer ‏ : ‎ Penn Plax
ASIN ‏ : ‎ B007GDXCVI
Best Sellers Rank: #117,172 in Pet Supplies (See Top 100 in Pet Supplies) #274 in Aquarium Heaters
Customer Reviews: 4.0 4.0 out of 5 stars 293 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

FULLY SUBMERSIBLE AQUARIUM HEATER: The 300W Cascade Aquarium Heater easily maintains healthy water temperature within a 1° accuracy, and can be set anywhere between 68 ℉ and 89 ℉, by using the red control knob. The 300W model works great for 55 – 75 gallon fish tanks.
VISIBLE & ACCURATE TEMPERATURE SCALE: With an easy to read setting scale in both Celsius and Fahrenheit, it’s easy to see the temperature adjustments being made. To increase the temperature, rotate the control knob counter-clockwise, and to decrease, rotate it clockwise; or, follow the + and – symbols located near the control knob.
ORANGE PILOT LIGHT: Our Cascade Heat Aquarium Heaters feature a pilot light that indicates the heating cycle status. This means that it will go on and off by itself as the thermostat cycles the heating element on and off. In other words, orange light = heater is on. Similarly, these aquarium heaters make a faint click when turning off.
ADDITIONAL FEATURES: In addition to being composed of heavy-duty and shock-resistant glass, 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.
MEASUREMENTS: Overall Length = 13.5” / Overall Diameter = 1.1” / Suction Cup Diameter = 1.25” / Wattage = 300W / Voltage = 110V