Hi I am new pool owner, someone helped me to open the pool but I have no clue how to clean it
The water is very cloggy , dirt at the bottom

I appreciate any help:
1) Whats the red valve here:

2) As i understand DS is the deep skimmer, how can I identify it ?
3) the suction of the skimmers are low, i turned off drain valve , still low, what should i do?
4) When I run the pump in filter or waste mode the water is draining 1 inch per hour, any guesses?
5) i have been usin the polaris robot cleaner for couple of days , it fills a bag in 3-4 hrs but still too much dust at the bottom, whats the best way to clean the pool? Not sure vacuum will work
The water is very cloggy , dirt at the bottom

I appreciate any help:
1) Whats the red valve here:

2) As i understand DS is the deep skimmer, how can I identify it ?
3) the suction of the skimmers are low, i turned off drain valve , still low, what should i do?
4) When I run the pump in filter or waste mode the water is draining 1 inch per hour, any guesses?
5) i have been usin the polaris robot cleaner for couple of days , it fills a bag in 3-4 hrs but still too much dust at the bottom, whats the best way to clean the pool? Not sure vacuum will work