What does BOD and SOD mean in water?

How do you clean your pool if the cover has been off all winter and the water is black and the whole pool has a brown slimy coatng on the walls and floor? What is a adaptation of a water star grass? Do they grow their rice in water? What is mustard algae will it cause brown staining on the sides and bottom of an above ground pool? What song is playing on the Sprite commercial that where they jump into the basketball court that is really a swimming pool that goes I am falling away with you I am falling away? What yearly maintenance needs to be done on fiberglass pools? What kind of paint do you use on concrete fountains? When sand filter set on filter water leaks out backwash hose? What side of a channel do boats drive on? Will streaks in anew gunite pool disappear? Your daughter had a ganglion cyst removed 11 days ago can she go swimming? Why does water harden? What is a swrf flange? What is the effect of wearing flippers when swimming? How many gallons of water in a 21 foot round pool 54 inches deep? Can a water pump go bad without leaking? Why do inflatable rafts lose air in the pool? How many homes have a water softener? What is the difference between synchronized swimming and ballet? Does adding an in ground pool add to the market value of your home?