You need a pool vacuum that goes into the skimmer. The vacuum has a long pole with a brush and hose on it. As you vacuum the bottom scrub with the brush it will go up the long hose into the skimmer. Every so often you clean out the skimmer and continue till the whole bottom is done. Then you go up the sides with the vacuum with the brush. The whole time have water running into the pool. When done shock with chlorine and run the pump at least 5 hours a day till the water is clear. If not start again vacuuming. Don't let it go on because the algae gets bad it's very hard to get rid of it. The hotter it is the algae gets worse. It will smell and draw mosquitoes. Check your pool water for chemicals for the right pa. Got to get it clean before you have swimmers it make them sick. Then you have to run that pool every day for 4 hours and every other day vacuum it. Pool are alot of fun but alot of work. I know we had a pool for 30 years my husband was the pool man, I was the wash the bathing suits and towel lady.