Difference Between Liquid Chlorine and Household Bleach

[sun and water]

I was telling a friend I use bleach in my pool instead of the stuff you get from a pool store. Another friend said "I am surpirsed you have not had real problems with bleach! It is not the same type of chlorine and will not sanatize a pool properly." How would I answer this? I told him it was just a matter of percentage that liquid chlorine is 12% and bleach is 6%. What else could I have said?