Total Dissolved Solids -- Salt adjutment

If my total dissolved solids is steady at about 4000 ppm (i.e., 4 ppk), but it is a saltwater system, should be concerned?  I’ve been assuming one should “net out” the salt content before being concerned.

I also occasionally test for phosphates, although the pool in not significantly exposed to fertilizers.  Should those reading also be adjusted for a saltwater pool?