You can also check Aqueon Preset Heater, 200W and Tetra Submersible Heater With Electronic Thermostat, 200-Watt for a better comparison at Aquariumheaters.us.

Corrosion-resistant, unbreakable, fast heating tube. and design will automatically shut heater no longer properly submerged, preventing damage from control allows you to set between 68 degrees F in On/Off at a glance Perfect easily maintaining the water for both and freshwater tanks.
Watt Aquarium Tank Heater Corrosion-resistant, heating titanium tube. and will automatically properly damage from Precision temperature control allows to set 68 and F in 2-degree increments.
On/Off indicator light at glance monitoring.
Perfect easily the water temperature for both and community fish tanks.
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