Hello, longtime lurker looking for help here. This forum has helped me out a great deal being a pool owner for my 4th summer. My wallet thanks you all!

Here is what we have:

IG VL 36000 gallons
Heyward DE 6500 (??) - approx 6 yo
Pentair Superflow 1HP - 1 year old
Kreepy Kadet auto pool cleaner - runs most of time pool is filtering
Runs from 7 am to 7 pm

Water Info:
Temp - 77f
TH: 150
FC: 3.5
pH: 7.2
TA: 100
CYA: 15

Water has been perfect all year, best ever with minimal maintenance.
Have been adding approx 4 pucks per week to floatation device.
CYA has been low all year and have increased it a bit but has not been problematic at all.
Add approx 1/2 bottle of liquid shock once per week.
4 oz of concentrated algaecide every two weeks.
4 oz concretrated iron out every two/three weeks. Have been adding a lot of well water due to splashout, evaporation and possibly a tiny slow leak that will be fixed soon.

Then Saturday I notice that my return flow to the pool has slowed and my Kreepy has slowed. The funny thing is the pressure is below 5 on the filter. I clean out everything, recharge the filter but no improvement.
Then I notice that the rear part of the filter, pumps and pipes have tilted approx 1 inch down creating an unlvel mechanism. The pump won't fully fill (full about 5/6 with water coming to top in the back of skimmer) and seems to be running sluggish as a result.

The pool house is ancient (I inherited it when I bought this house) and the floor is sinking. I will be trying my hand at repairing this next weekend or sooner if possible.

In addition to the Kreepy slowing down, the pool has now turned green after I gave it it's regular chemical treatment, (shock and algaecide) last night.

My two questions are:
Is the pump/filter running slow due to unlevelness? If so would the pressure still read below 5 too?

Is the water starting to go green due to slower filtration caused by slow pump? If so, if I run for 24 hours a day, will this help the process? I assume it would but could it damage the pump?

Thank you very much for all of your help.