Because of the algae that grows in the water, as well as fish feces and other impurities that are naturally in water. Also, the fish food contributes to the murkiness of the water, too.
The water is murky
what does murky water mean
Into the Murky Water was created on 2011-05-02.
No, "murky" means hard to see through. Deep water can be murky because it is often dark, but shallower water can also be murky if it is muddy.
Murky means unclear or cloudy, uncertainty.
Water in an unwashed glass last used for milk may look murky.Though murky, the water still tested okay to drink.It is hard to create a murky appearance of water, though it is often seen in nature.
I looked into the pond water and tried to see my reflection, but the water was just too *murky*.
Fish comes top of the water to get oxygen.
dirt
Yes. goldfish breathe water so if a goldfish is out of water it cant breathe so it will suffocate
change water
suspend particulate