fluoride/fluorine will soon or already has been added to our dam i was wondering if this is poisonous to a reef tank thanks in advanced for you help oh i dont have a r/o filter
You can do that... or you can always purchase yourself an API tap water filter.
It will deionize your water by collecting more harmful unneeded chemicals and minerals in the water. It will also not be as wasteful as an RODI. Helps if you are putting off on a RODI system, and will still take out some junk from the water.