R/O vs Tap Water

[donlankford]

Im getting a R/O unit here in a few days. I was just using regular tap water to do 25% water changes. I know i know not good :frustrat: for the fish but they seemed to be really happy. Can only imagine what they will feel when they get better water. But i had a question about they next water change with the R/O water. Should i still just do a 25% water change with the R/O water or should i change all the water cuz it is just tap water?

 

[BL1]

Tap water isn't really as big of a problem for fish as it is for corals and inverts. Just continue your normal water change schedule with the RO unit and eventually you'll get all the tap out.