Hey there. I am a first time pool owner and have a very frustrating problem. My water is green and I have just found out that after buying $100 worth of chemicals and using them that my lines are apparently clogged because I am getting next to no return from my returns. I have found on YouTube where you can blow them out with an air compressor but I don't currently own one bit I do have a 180 mph backpack leaf blower and have read on other sites where you can blow the lines out with that. my problem is......HOW THE HEK DO YOU DO THAT? I know with the leaf blower that I have to go through the skimmer but which hole? the one that is covered with a screw on cap or the one that has a moveable cover that I can't seem to move completely off of it? also, I am not sure if I need to be ready to plug each return as they blow or what? I AM SO FRUSTRATED, I just want to get my water clear for my four girls this summer. I have a 10,000 unground pool with a sand filter. I am very close to converting to salt. The water is green because I apparently have a flow problem due to the line blockage so no good filtration and no circulation for chemicals to work. Thank you for your time and patience with me.