A picture is worth a thousand words . . .

[Pamsel]

We replaced the sand last summer, so I've not been too concerned that the sand is junked up. But, it's probably worth taking a look. I'll have to have my husband get involved with opening the filter - that's a bit out of my league I think.

I went out tonight about 10:00 pm and could see stuff settled on the bottom, so swept the entire pool again and then added 4 gallons of CL to get it back up to shock level. Am waiting a couple of hours and then going to add more acid again. Then I'm going to bed and will see what it looks like in the morning!!

Edit - I typed the above message before seeing your posts, Marie and Evan. But I guess for now, I'll stay with the plan I posted, since I have already added the CL and it does seem important to get the PH down. I also stopped the aeration for now. My pressure guage is now above 45, but everything sounds normal out there - would there be any difference in the sound of the filter running if there's a real problem? Funny thing is that it was reading normal (18-20) this morning before I left for the day and when I came back this evening, it was over 30 and each time I check it, it's gone higher. Also, normally when I backwash, the pressure drops to 0 but tonight it stayed high, so I'm wondering if it's broken??