Hey guys I recently moved from KW to Windsor and have been to a few peoples houses with reefs. It seems to be a 50/50 split on people using tap water and RODI. I had never heard of anyone using tap water before but have seen successful reefs using it here. Is this common in some cities ? Im thinking of starting a 60g up again and will be getting a RODI unit but was shocked with people using tap water. If your not keeping sps is this when tap water is acceptable ?