Alkalinity/ Pool Water Balance

:( Can somebody shed some light on this situation for me I am ready to go nuts. I have a 18' x 48" round Intex Pool and this is my second year with it but I can't get the TA down to where it needs to be. I have added countless amounts of HTH PH Minus just like the company's help line said to do and American Sales said to do and all it does is lower the PH. When I add shock sometimes my water gets cloudy and it's not as clear any more as it used to be. My PH is on a roller coaster ride. HELP

Read the sticky at the top about lowering TA. You need to AERATE (like a fountain or a bunch of kids jumping around) once the PH is around 7.2.