Eheim Jager Aquarium Thermostat Heater vs FREESEA Aquarium Submersible Heater

Both options make for good, if unremarkable, Aquarium Heaters at the $20 budget range. While they should serve reasonably well, you might want to look into some other options at that price point.

If you're still interested in learning more about the Eheim Jager Aquarium Thermostat Heater and FREESEA Aquarium Submersible Heater, however, we wrote-up what we know about them:

The Eheim Jager Aquarium Thermostat Heater hasn't managed to perform well enough to earn a place in any Aquarium Heater roundups conducted by sources that do their own, high-quality, hands-on testing. That alone makes it a hard product to recommend.

As for the FREESEA Aquarium Submersible Heater - it wasn't considered to be a good enough purchase to earn a spot in any roundups conducted by sources that perform objective hands-on testing, which typically indicates that a product isn't worth its asking price.

As a last step, we wanted to do a head-to-head Eheim Jager Aquarium Thermostat Heater vs. FREESEA Aquarium Submersible Heater comparison of their review performance but, unfortunately, weren't able to find any review ratings on either product.