My salinity is way too high

[RV Reefs]

As of December 25th, my salinity has been way too high. My ideal salinity is 1.025 and as of the 25th, it is at 1.030. What should I do. This tank has no fish, inverts or coral in it yet but the fish are coming in a couple days so I need this fixed by then.

 

[A Young Reefer]

are you topping it off? by replacing the water evaporated with fresh water?

 

[Zach B]

You could remove some of the existing tank water and replace with rodi water

 

[Randy Holmes-Farley Verified Community Expert]

Be certain it really is high and not test error.

Once convinced, replace 12% of the tank volume with RO/DI to get to 35 ppt (sg = 1.0264).

If you are trying to match the incoming salinity that the fish are at, you may need to be even lower.