I've been trying to help my dad out with his pool....his water was constantly cloudy...so I had him shock several weeks ago until we passed all the steps. Talked to him last night and he said water is cloudy again and small areas of algae forming on the walls. I looked at the records he has been keeping...his chlorine was normally between 3-6....I did see a couple of times where it dropped into that 1.5-2 range. PH is usually in the 7.2-7.3 range. CH was 350. CYA was 30-35. TA was 120. He uses trichlor in his skimmer....and throws in about 7-8 pounds of Cal-hypo every couple of weeks. He also throws in some algae inhibitor( some Bioguard product) every week. His pool is about 35,000 gallons plaster surface, sand filter, 4 returns. I t seems like he is always getting the patches of algae on the walls and cloudy water. I've tried to steer him to TFP but he's kind of stubborn. I told him to keep his FC above 5 for awhile. The circulation in his pool seems to be rather low. Any thoughts or ideas?