UV Sterilizer Worth it or Not??

Late last year I was picking up asterinas from fellow reefers to feed a harlequin shrimp in one tank. I did not rinse or qt the asterinas, just drained all water. Unfortunately the asterinas brought in a bacterial infection that killed my 5 year old wrasse (all 4 of them) in one tank. I am positive the UV prevented the bacteria from spreading to other tanks, as I had no deaths except in the one tank I added the asterinas.

This is a photo of the UV prior to installing, with pails for size reference. I thought it was ridiculous when it arrived, now I am considering getting a second one for the quarantine system.

I run a three tube 42” high Lifegard Aquatics UV on my 4 Tank system that is plumbed to one sump. All water goes through the UV when it leaves the sump, as the UV is plumbed onto the output of the return pump.Late last year I was picking up asterinas from fellow reefers to feed a harlequin shrimp in one tank. I did not rinse or qt the asterinas, just drained all water. Unfortunately the asterinas brought in a bacterial infection that killed my 5 year old wrasse (all 4 of them) in one tank. I am positive the UV prevented the bacteria from spreading to other tanks, as I had no deaths except in the one tank I added the asterinas.This is a photo of the UV prior to installing, with pails for size reference. I thought it was ridiculous when it arrived, now I am considering getting a second one for the quarantine system.