HrHagel;3610638; said:In your calculation nc_nutcase, what were the flow rates on your setup with UV?
Since flow rates is one of the key elements in setting up a proper UV sterilized tank.
The less flow rate the more contact time with the water through the UV sterilizer = better filtration
nc_nutcase;3609838; said:1W of UV strength per 10 US gal...
At 10 US GPH per 1 W of UV strength...
I do think a 9W light will be large enough for your 72 Gal bowfront... the trick is only flowing 90 gph through it... 90 gph isn't very much...