25 watt or 57 watt?

[FerrariStradale]

I'm looking at the Aqua UV 57 Watt 2 inch UV Sterilizer.

Aqua UV recommends the 57 Watt for my 250 gallon FOWLR display (est. 320g total). (some mushrooms and polyps)

However... everyone I talk to says put a 25 watt on.

Which would you put?

[kgross]

What do you want the UV to kill? Algae spores, or parasites?

[FerrariStradale]

parasites

[kgross]

Then go with the 57 watt. Or even higher.