can filter run without the uv?

Yes. It has its own switch on the top of the filter housing.

172 GPH would be too powerful for my 15 Gallon tank? Also does it come with the UV light?

We have it in a 20 gallon tank and the current is gentle.

How much watts does it use per hour

UV LIGHT uses 7 watts. Pump uses 9 watts. 16 watts total. Andrew below didn't understand the question.

Realmente tienen buen caudal de agua el 660, los 2500 litros hora son reales?

El caudal es fuerte al inicio no lo notas pero después denun rato cuando saca todo el aire del sistema si se nota la fuerza, lo recomiendo ,el.exito está en el tipo de material filtrante que se use y el.orden en las canastas

Package Dimensions	29.01 x 28.6 x 19.99 cm; 3.52 kg
Size	172GPH
Quantity	1
Batteries required	No
Batteries Included	No
Item Weight	3.52 kg

AMOSIJOY 172GPH Canister Filter, Ultra-Quiet External Aquarium Filter with Free Media for Large Fish Tanks and Aquariums (172GPH)

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