Man, thanks for that info. I saw those screws, but was afraid to pull that can apart, thinking water would run out. However, that UV is unlike my other one. When opened, it's weird how there is no water that passes where the light is. I can't tell how the light helps on that unit. Also it was so screwed up in there that the ballast(sp?) was broken and needs to be replaced. Now I am trying to find it. Lowes don't sell it. Any ideas being Custom Sealife is out of business?