Definatly DO NOT GET ONE without the Quartz sleeve.This sleeve also intensifies the bulbs efectivness,and prolongs bulb life by keeping it from coming in direct contact with the water.Some manufacturers also offer a "wiper" that allows you to wipe off/clean the quartz sleeve without dismantaling the unit...Both options are a must...
[ August 05, 2001: Message edited by: MR . SALTY ]