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I am in the middle of a SLAM. The PSI gauge on my Hayward sand filter has been slowly creeping up over the last few weeks, and even after a backwash does not go down. And it doesnt go down when the pump is off either, so I figure its either broken or malfunctioning. However, I went out yesterday...

I did the OCLT test 2 days ago and it dropped by 1 ppm. Thats another thing that makes me doubt its algae. Is it even possible that pollen can turn the water green? Maybe if my pump is unable to keep up?

I read about how you can add some DE mixed with water into the skimmer to increase the sand filter's ability to catch small stuff. So I did that, it took a cup to increase the PSI by 1 lb. Do I need to add DE each time I backwash? IE does it get washed out when I backwash? Any other tips...

Right, I just started the SLAM last night, but am considering abandoning it if Im on the wrong path. With CC=0 is a SLAM the right course? Ill take pics tonight. Here were the test results before I added the 8 gallons of bleach: FC=3 CC=0 TA=130 CYA=50 salt PPM = 3500 I updated my signature to...

I have the same issue. A green pool even though my FC is consistently 3-4 and my CC is 0. I have a SWG and sand filter and last night i put a cup of DE in the skimmer to try to help it get the smaller stuff. Based on reading here, even though the CC was zero, I figured it must be algae so I...