Do your kids wear goggles when they go underwater? The amount of salt you added should have gotten you to about 2500 ppm, which is higher than what most Non-SWG pool owners take their salt level to. The "noticable" feel may not be as noticable due to your water chemistry.
What are your pH, Alkalinity, Hardness, Free Chlorine and Total Chlorine levels?
If your pH, hardness, or combined chlorine levels are already on the high side, it may neutralize the soft water feel by being in an irritating condition to begin with.