Water changes with fresh water??

[agataoneil]

I have heard that doing water changes with saltwater will eventually lead to really high salinity levels overtime since salt doesnt leave the water... I was told to do water changes with fresh water to dilute the salinity, is this true?

 

[carey]

nope not at all true. You top off any evaporated water with fresh unsalted water but water changes are always done with salt water that should match the salinity in the tank.

 

[agataoneil]

I assume filtered water right?

 

[Schism]

Ro/di water which is reverse osmosis deionized.

You do water changes with saltwater not freshwater. When you do a water change you are removing saltwater and replacing with saltwater. The salt does not stay in during a water change. Only evaporation leaves the salt behind in which case you (top off) with freshwater.

 

[agataoneil]

Ro/di is freshwater right, the kind is sold at lfs?

 

[spoonman]

Most lfs sell both. ro/di and ro/di saltwater.

 

[JustinKBreen]

They should be selling ro water, if they only refer to it qs fresh water I would confirm with them that it is ro and not tap water.

 

[Schism]

^ good point.

You want 0 TDS water. Tap will not come close. My tap runs at about 300 TDS. Your water is critical in salt tanks so best not to use tap.

 

[agataoneil]

Thank you everyone for replying and for all the info, I really appreciate it.

 

[Saratj1]

Anytime you remove saltwater from your tank, replace it with saltwater, anytime you add water due to it getting low from evaporation, use freshwater.