just make sure it is a quality sterilizer - a good one usually runs a couple hundred bucks. Advertising on them can be misleading. You want one that can handle a decent amount of GPH depending on tank size without a fast movement along the UV light - which means they should be bigger than one would originally think. If you get a good sized one, it will help a ton , just ahve to clean the casing every couple months and change bulb once a year or so.
180g DT, 35G sump, 25G ATO, 2 Reef Octopus skimmers NWB200 &150, BRS Dual GFO Carbon reactors, 160g EA 40Watt UV sterilizer, Bio Pellet reactor, RK lite 3, 150lbs pukani BRS dry rock, bb. 1200 GPH Danner Mag, BRS RODI, 7 Koralia PH's 1x 2800 GPH, 2x 1400, 4x 750.