My new 100g. FO tank is almost cycled! I bought the tank from my LFS and it has a filtration system with bio-balls and 3 filter media trays(currently running 2 foam and 1 carbon)built in the back of the tank. My LFS told me that since it is not a reef tank, a protein skimmer is not needed, but a UV sterilizer is a must. It seems as I read through the majority of the posts here that most people seem to suggest the opposite, meaning a skimmer is a must and UV is optional at best. Is my LFS right because of the fact that it is a FO tank or should I be looking for a skimmer now as well?