RO/DI water filter and freashwater aquarium

[Beverly]

Originally Posted by Chad

I just purchased a RO/DI water filter for my reef aquarium. I was also going to use it for my freshwater aquarium as well but was then told that I would have to add some supplments?

Chad,

Why not take the route most people take and simply use tapwater and dechlor for your FW tank? That's what we do and always have done for FW. Only use RO water for top up to compensate for evaporation in FW. Using tapwater, rather than RO and supplements, is going to be cheaper, less time consuming, and probably just as good for your fish, imo.