SWG Install and Opening Help

Cleaning brush arrived today and my brother in law is coming over to help me get the steps out. I'll give the steps and the ladder a good scrub. I back washed the filter yesterday and today as my flow started well and then got progressively slower throughout the day. I also vacuumed to waste a bunch of dead algae from the bottom of the pool, so I've had a hose running pretty much all day to try and replace the water. I think I'll retest my CYA during my next FC check because I think it's gone down from the back washing and hose filling and my last FC check I didn't have to add LC because my FC was still above SLAM level (I think because I added based on having a CYA of 50, but if it's lower now I probably added too much). Pool looks much better after vacuuming so hopefully tomorrow I'll be able to post updated pictures of the progress. Appreciate all the help and prompt responses so far. TFP rules.
 
Last check CYA was 40, down from 50. I added LC this morning around 6:30 AM to SLAM up to 20 FC. I just checked and my FC is still at 17. I guess that's good? Means most bad stuff is dead. Deep end is still a little cloudy, can't completely see the bottom. I've had to turn the pump off for a few hours while the water level gets back up after back washing and vacuuming. So hopefully I'll get that back on in a couple hours ans resume testing.
 
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You're doing great. Stay the course. (y)


Towards the end the big quick improvements become much less visible and folks need to drink a large glass of patience.
 
Water is progressing. Like @Newdude said, big changes can't be seen anymore but it does appear to slowly be getting clearer. I'm only on full day 4 of my SLAM, so I'm sure there is more to be done. One side question I have about my pump setup is this: I have to run my Superflo pump at 2200 rpm minimum for my flow light to go green on my IC40 SWG. That seems really high. Also, after a while during the day even that won't be good enough and the light will go red. Granted, I'm not using it yet, but when I switch over to it I really don't want to have to micromanage the flow, and the point of getting the VS pump was to run it at a much lower rpm to save money. I'll backwash and rinse, and then the 2200 rpms are good enough for a while, but always goes red fairly quickly. Also throughout the day my flow at the returns noticeably slows down. Could this just be left over algae in the water clogging the filter, and constant backwashing is normal during a SLAM? The sand filter is old and the only thing I haven't replaced so far and I do notice some sand in the pool. Not a lot, but some. I'm trying not to worry about a million things at once, but I don't want to finish my SLAM and then not have a working SWG, or needing to run my pump at higher speeds. I can take pictures of the piping if needed (it honestly looks like a mess to me). I also have 2 skimmers, one about 8 feet away from the pump, and the other is at the other end of the pool 40ish feet away, not sure if that factors into anything.

Quick question I just thought of, if I set my filter valve to recirculate and dial in my rpms for the SWG there, how much higher does it tend to be after going through a sand filter? I assume it would require more (obviously) but would there be a decent test to determine if my filter is just reducing my flow too much? Sight glass is clear, even when I backwash. I do see sand coming out through the sight glass when I backwash/rinse as well. I know this is a long rambling post with a lot of questions, so I appreciate any help while I'm finishing the SLAM.