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Fluval P25 25W Submersible Aquarium Heater

Model: P25 · US configuration

Fluval P25 package beside a heater illustration; the front label reads up to 6 US gallons / 25 L and 25 W.
Fluval P25 / A744 package image; not to scale or performance evidence.

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A 25-watt preset polymer heater rated by Fluval for aquariums up to 6 US gallons, with a fixed 76–78°F temperature band and fully submerged in-tank installation.

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Why consider this model?

  • A possible fit for a freshwater or saltwater working volume up to Fluval's 6-US-gallon rating when a fixed 76–78°F preset and fully submerged in-tank installation are acceptable and the 5.9-inch body fits.

Tradeoffs to weigh

  • The P25 has no documented user-adjustable setting or digital temperature display, and its maker-rated capacity is conditional on the thermal conditions of the aquarium. Numeric accuracy, dry-run auto-shutoff and inline installation are not established by the sources reviewed.
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Manufacturer information