These used to be constantly discussed but that discussion has fallen off. Hence the lack of responses. IMHO they are not really needed in reef aquariums. UV was a new water disinfection technology for drinking water and people thought it would work similarly in reef aquariums. They work by micro-organisms such as algae, bacteria and parasites are exposed to UV radiation damaging their DNA and they die. Now for the results. Aquarium water is packed with micro-organisms hundreds or thousands of times what is found in drinking water even if it looks clear. Because of that, some can 'hide' behind other bacteria and get through the filter. They need to be exposed to the radiation for a certain amount of time which just does not occur in home aquarium units. They are reproducing quicker naturally in the tank then what can be removed by the UV. For the unit to work as designed in fresh water, you would need massive commercial unit to do a home reef aquarium. They do have their place as they can help reduce the 'green' look in water, but at the end of the day it is an expense that typically has no noticeable results but may be something that works for your needs.
That said, the Jebo 36w Uv Ultraviolet Sterilizer recommends a Maximum Water Flow: 145gph. If you are running a dedicated pump to the light make sure it has its own snail guard and filter to stop unwanted critters from getting in. By its design, you will not get algae growth in it as it is designed purpose is to kill algae.
