This is a 130 Watts (2 x 65 watts) UV filter I built out of 2 inch and 3 inch fittings.
The top end assembly:
The quarts sleeve support to keep the bulb center in the water column:
Another look, supporting the sleeve/bulb:
Knock out plug to keep the water from short circuiting through the cross that supports the two legs. This is glued in-between the two 3 x 2 inch crosses.
The completed unit. Doing the annual bulb maintenance several years later:
