Tap water vs reverse osmisis

[dallen]

When replacing evaporated water in a salt water tank, should I use regular tap water or reverse osmisis water and why? thanks

 

[scales1]

I believe that anyone here will tell you that without a question you should use RO water instead of Tap. I read somewhere that there are times that water facilities put certain treatments in there water as a way of flushing out contaminates, this can be detrimental to your fish tank if used without some sort of RO/DI unit. I would recommend you use RO water for all evaporation and water changes to avoid any problems.

 

[reefnut]

Use RO/DI water. A good RO/DI unit will take the TDS (Total Dissolved Solids) of tap water to 0... cleaning out vertally everthing leaving you with 99% pure H2O.

 

[joerdie]

i would use RO. my ro unit normaly registers between 2-6 ppm of TDS. this is much better that the tap at 250-300 ppm tds

 

[kaotik]

is there a difference between RO and DI water? My LFS only has RO.

 

[reefnut]

The DI (De-ionizer) just gets the water a little cleaner. Basically it will pick up what the RO misses.

 

[druluv]

The DI piece is very important, the ro filter doesn't catch every thing. Some RO filters don't filter out PO4 or NO3. I feel no ro system is "really" Complete with out di part of the whole system.