I am new to pool care but I found a thread on this forum that seemed to describe my issue perfectly. It was titled "the bottom of my pool is dirty every day" Since that post was 792 days old, I was told to start a new thread. So here goes! What happens is this...my pool looks great one day and the next it is cloudy, the next day there is "dirt" on the bottom of the pool. if you swish it, it mixes with the rest of the water and disappears although that section of the pool is now more cloudy. The thread I was looking at said it was algea ( but to me it looks like dirt) But sure enough the next day my pool has a slightly green tint. Many folks on that thread talked about CYA being too high. so I ordered a test kit. In the mean time, I brushed the pool, super shocked it and lowered the PH. the pool looked great for 24 hours. Last night it started to cloud up again so I added 2 more gallons of chlorine. This morning it looks better, but it is not crystal clear. Then the test kit arrived. Not sure what all readings you experts need but the chlorine levels are bright dark purple and the ph is 7.2. The CYA is negligible, The test instructions for CYA tell you to mix pool water with the chemical and then pour in to the test tube until you can't see the black dot, well I filled up the tube and can still see the black dot. Pretty sure I followed the directions correctly. That said I am guessing the cloudiness will come back by later today and within a couple days I will have the green tint back unless I keep adding huge amounts of chlorine and this redhead does not want to be blonde the rest of the summer, so someone help me! What other test results do you want? Is there an algea preventative? brand name please? What am I missing?