I've had my pool for 16 years and never had a problem until Today. Last year my pool heater(Hayward) bit the dust so I installed a new one in July. Also a Hayward. It lasted until two weeks ago and began leaking. I'm not going to get into details with discussion with Hayward but I was told my PH was low. Funny I had the old heater for 16 years and no problems. Well I bought a new heat exchanger and figured I better raise the PH if indeed that was the problem. So I went out and bought PH + put it in and my pool turned bright blue and clouded. I never have a problem with color or any discoloration from the time I open until I close. Also I clog up my earth filter in 30min. I've changed the earth but still clogs up. I always new my PH was low but never had a problem or complaints.