I have a 15W Aquanetics inline UV sterilizer that works very well but I am running a 75 gallon FO skimmerless and think I should go skimmer before UV. I inherited the UV when I bought the tank so I do not know how old it is, however it did not work when I tried it and I ended up putting in a new bulb, two new seals, and a new starter so it is almost brand new. The only old part is the casing and wiring. I would prefer an in sump model. Any takers? I can take pictures if need be.