I think it's a salt generator that makes chlorine from the salt but the water isn't salty. The water isn't salty tasting, is it?
You should get what's known as a frog log. I suggest 2. I keep one on each side of the skimmer so they can get out. https://amazon.com/dp/B08GKHFK45/ref=cm_sw_r_cp_apa_fab_PGSyFbF372DC1