How does a scrubber compare to an ultraviolet sterilizer?
A UV kills ick, and other parasites and food that are alive in the water. A scrubber reduces nitrate, ammonia, phosphate, grows pods, cools the water, increases pH, increases oxygen, allows live plankton to feed the corals, removes metals, stabilizes pH on a reverse photoperiod, and works without a skimmer. However a scrubber does not kill ick, and that might be reason enough to have a UV (for when you add new fish).
