All i needed was shock. Shock and swim to be exact. The guy gave me chlorine and it did NOTHING to our doggie pool except make it wreak of chlorine. The guy was rude and gave me what he "thought" i needed rather than what i actually asked for. I shouldve went with my instinct and not have taken what he chose to give me. Never again. His attitude was horrible. I wont be returning. I will drive around until i find a walmart who still has what i need, before i ever step one foot back in that place.