What you really need is a good test kit such as Ben's ps234 or a taylor k-2006. That would solve your problem of testing your chlorine levels. As a general rule of thumb if the FC is below 10 ppm you can swim. (it is actually safe to swim in much higher levels if the CYA is high. With your cya of 60 ppm normal chlorination is in the range of 5-10 ppm and shock is 20 ppm or higher so I would think that anything below 15 would be a good rule of thumb.
for a way to test higher chlorine levels with your kit do a search on the forum for "shot glass method"
BTW, most PBs don't have a clue about water chemisty and water balance. I work in a pool store and have seen the results of PBs balancing water for customers!(and giving them info on water chemistry and care!
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