You can go w/out though of course a CUC is usually beneficial, perhaps your tank is still new enough it does not need so much or sustain them on tank waste alone.
I would also consider reefcleaners dot org or a similar online supplier.
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Current Tank Info: SCA 120g RR Starfire, Tunze silence 1073.02 return, 40g sump w/ fuge, SWC Extreme 160 cone skimmer,Geismann reflexx 4xT5, 2x Panorama Pro LED strips, Vortech MP40QD
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