Salt in sump cabinet

[KyleC]

So, I know that only freshwater evaporates, not the salt, however I've noticed what seems like a fine layer of salt building up inside the sump cabinet. On all the surfaces. If I run my hand over it, it seems like salt to me? No splashing in the sump so something is evaporating with the water and condensing inside the cabinet?

 

[KyleC]

Salt creep apparently, but I don't know how when there's nothing splashing inside the cabinet sump area...

 

[Phil413]

Are you seeing micro bubbles? What salt do you use?

 

[workhz]

There’s always something splashing. Micro bubbles, water movement. Always something agitating the water.

 

[KyleC]

I assume it's coming from the skimmer... I use SW from the LFS