sandj, I see you are doing the 25ML test chlorine test, and you will go through a lot of reagent that way. Feel free to use the 10mL test and save some of that reagent.
Just to let you know, I opened my pool a week ago Saturday, and after SLAMing (it took a couple of days), I had a blue cloudy pool. My FC was holding overnight (OCLT) and it was just a matter of the filter doing its job to clear the water! I could see the bottom on Saturday (took one week exactly). I don't know much about DE filters, but you may need to backwash (I think the rule is that when the pressure increases by 25% over clean pressure, then backwash, which means if 8PSI is your clean pressure you are backwashing at 10PSI).
CC typically gets burned off from the sun. Does your pool get a lot of direct sunlight? Also at 35 CYA (round up to 40), you should be keeping FC at 5-7PPM so use Pool Math after testing to add the right amount of Chlorine. (see Marty's response for the SLAM level below).
Also, remember dead algae will fall to the floor of the pool. If you vacuum with your robot cleaner it will likely get stirred up and cause additional cloudiness. I find that if I stick a pvc pipe into the end of my vacuum hose and hover over the dead algae, I can vacuum it up without stirring too much up. It slow and takes time but the results pay off!