The most common question we get is which size fountain should I buy. Whether you have a large pond or a small pond, our sizing chart below can tell you which fountain to buy. Pond SizeLighted FountainUnlighted Fountain1/3 – 3/4 acre pondEFL190EFS19001 – 2 acre pondEFL250EFS20003 – 4 acre pondEFL350EFS30004 – 5 acre pondEFL450EFS3000