oh thank god lol
what exactly ARE your water parameters? what is the ammonia, nitrIte and nitrAte levels? if you are using the strip tests i would bust out another 30 bucks and go get yourself a API freshwater test kit. they are really easy to use and waaaay more accurate than strips. strips give you false readings over time as every time you open it and stick your fingers in to get strips you are contaminating and adding moisture to the strips in it.
get a liquid test kit if you dont have one and test those three things. tell us what they are. and i would wait 48 hrs then do a waterchange.. dont add more salt, its already in there..
DEPENDING on what youre test results are, i would probably change 25 percent.