Thanks for the reply Janet.

No DE has blown out the returns. It is stuff like bugs and pieces of leaves. As far as I can tell, I don't see anything besides water coming out the returns. The only time I saw something other than water come out the returns was when I apparently put granular CYA in the skimmer too quickly and some of it came out the returns (I had just about 0 CYA when I bought the house on 31 May. I added 4lbs of granular CYA over about 1 hour. I thought that was slow enough but I guess not). That is why I temporarily switched to the trichlor pucks for ease of raising of the CYA.

I will add some (I'll check the pool calculator for the amount) bleach later this evening.

The walls (white) of the pool are slightly turning an "off white." Do you think this is happening because my chlorine is low? Besides brushing, are there any tricks to clean the walls?

I appreciate the help this forum provides. Without the forum, my water surely would not be clear.