The label with "To Pump" and arrow is backwards for the direction of flow. The arrow should point the other way and it should "From Pump". Arrow on the other pipe is wrong too.
Also, We don't have a way to "vacuum" the floors of the pool, other than a net bag type thing we attach the garden hose to. So that's only good for large debris, not the green algae gunk on the bottom of the floor. So if I were to purchase something to attach to the skimmer, or pump, or whatever, what do I get?