Adjustable Submersible Heater — 25 W to 300 W

A straightforward adjustable heater — dial in a temperature between roughly 20 and 34 °C and the thermostat holds it. Sizes from 25 W nano tanks to 300 W large displays, all fully submersible with suction cups included.

• Exact-size thermostat. The dial clicks to a real set point; the red light tells you when it's actively heating.
• Shatter-resistant glass tube. Fully sealed and submersible — lay it or stand it, as long as it's underwater.
• Suction cups included. Mounts vertically in a corner, out of the flow of your aquascape.
• Size up, not down. A slightly bigger heater cycles less and lasts longer. Rule of thumb: 1 W per litre.