To be honest if you can't justify spending $100 on an RO/DI unit,how are you going to justify spending more on stuff to remove all the algae your gonna get.
hackteck said:i really think it depends on the city water quality because some people use tap water and have no problem others have algae issues but i do think spending money on an RO unit at the least is a very sound investment
melosu58 said:I work for a water municipality and wrote this article. It might help you to understand the problems with tap water in the reef.
Tap Water in the Saltwater Reef