Anyone using water softened tapwater in their reef?

[Megalodon]

Originally Posted by bignose

Compare the cost of the RO(DI?) to store bought. It's probably cheaper to run RO and you can keep the dirty water for whatever.

It is, for sure! Don't buy the expensive hobby-brand either (sans DI), as you can get an RO unit for drinking water for relatively cheap, then just add on the DI cartridge.