AquaUV

[DS5000]

looking to add the 15W AquaUV to my 50gal RS 170.

Trying to choose which pump to buy. Ideally I was thinking about a small DC pump so I can change the flow rate to go back and forth between bacteria/algae tx vs fish protozoan.
The AquaUV site lists gph flow rates for a 75gal tank.
Does any have a way to calculate what's needed for a 50gal?
Any with a 50gal tank running something similiar?

thx

 

[Quietman]

From my build thread. 15W AquaUV on a RSR 170. Using on my return flow with a DC Tunze pump.