I have a 50-gallon All-In-One Reef. I am wanting to get a UV Sterilizer to help manage Marine Ich, etc. I have been getting conflicting information. On one hand, I am told that I have to have something at least 40watt in order to manage parasites like Ich. On the other hand, I've been told that even doing something like an 8-watt Aqua Advantage HOB with a slower flow rate would work. There seems to be a stark contrast between these two options. Experienced UV users, I would love your thoughts.