When our daughters were little we had a 16' x 4' above ground pool and used bacquacil. got rid of the pool when they wouldnt clean it. lol now 10 years later we have a grandson and just got a 12' by 3' intex pool. we have decided to go with chlorine. but I cant seem to get it right! i have a 3 way test kit that i use. the water looks great but the test kit says both chlorine and ph are low. i have shocked it twice and put 1" chlorine tablets in it daily. i am so frustrated. i want to take a sample of the water to our local pool place but i know they will try to sell me more chemicals!! lol i am open to suggestions... i also would like to know what type of vacuum i should get. thanks so much for reading this and considering helping me!