Many aquariums will be crystal clear in the beginning. However, when you begin to add fish, coral, (if you add coral) and when your rock begins to encrust with algae you may have a few issues with bad algae and maybe a little bit of water clarity issues. To prevent these future issues you should use ro/di water.
Hope you don't have any of the issues to any extent at all.
Good Luck!
T.S.