low salinity need some advice

[Rogue951]

remove water and add properly salinated premixed water.
or add salt slowly to sump but get rid of the excess water.
they key is SLOW change.

[Bloodasp]

raise it by .001 every 3-4 hrs until you get to your ideal salinity.

[bignose]

I added 5G of higher concentrated water and brought it up to 1.018. Surprisingly my sps still have polyp extension. Only sign is one of my sps has faded in color a bit. This is going to be a long night.

[kien]

Looks like you've got everything under control. Another suggestion would be to put some fans on the tank to speed up evaporation and let the evap slowly raise your salinity. Top up with saltwater until your salinity reaches target.

[bignose]

thanks everyone it's all good now.