An aquarium enthusiast on our community message board told me I need an ro/di system to keep a saltwater tank because our water is very high in silicates and phospates, which are terrible for a saltwater tank. He said I will not be able to control algae outbreaks without using ro/di water. Anyway, I thought about this some more, if we have hard water in our community, would it be the same if we just got a water softener for the entire home and forget the ro/di system and just use that? Thoughts?