Went away for a week, came back to 1.60 salinity...??

[gobytron]

ATO was working perfectly.

No fish losses but all of my coral are affected, my clam detached (after 2 years in the same spot) but seems okay.

Most coming back, some will have to wait and see.

Cyano and dino flare up all close to gone now.

In any case, can't figure out for the life of me how this happened?

Any thoughts or suggestions?