The Bottom Line
The Rena Cal Excel aquarium heaters manufactured by Aquarium Pharmaceuticals, Inc. are well constructed, using high quality components. They are easily adjusted to maintain the right temperature.
Pros
- Easy to adjust temperature control.
- Easy-to-view indicator light.
- Mount either vertically or horizontally.
Cons
- Higher than average price.
Description
- The tubes are made of heavy-duty, 2-mm thick, borosilicate glass to resist accidental breakage.
- Insulating stainless steel connections help assure controlled on/off frequency.
- The temperature control knob is illuminated for at-a-glance viewing.
- 500-micron solid-silver contact thermostat eliminate the contact welding that causes overheating.
- Five wattages (50, 100, 150, 200, 300) to choose from.
- To adjust the temperature, just snap, click, and set!
Guide Review - Rena Cal Excel Submersible Aquarium Heaters
The Excel models are Rena Cal's best submersible aquarium heaters. They are easily adjusted to maintain the temperature within 1°F (from 66°F to 90°F). The Excels are easy to adjust with the easy-to-view indicator light. These heaters can be mounted either vertically or horizontally. The Rena Cal Excels are in the upper price range for heaters, however a majority of users indicate that they are well worth the few extra dollars.
