Fish
Different species required for each of 3 depth-zones. The fish need to be herbivores.
- Surface
- Middle
- Bottom
Read more about this topic: Organisms Used In Water Purification
Famous quotes containing the word fish:
“My face is muffled in my mothers clothing. Her rhinestones injure me. See: my feet are going. Fish flee the forefinger of my aunt. The sun streams over the geraniums. What has this to do with what I feel, with what I am.”
—William Gass (b. 1924)
“Hurry, Godfather death,
Mister tyranny,
each message you give
has a dance to it,
a fish twitch,
a little crotch dance.”
—Anne Sexton (19281974)
“But when a man poured fish into a pile,
It seemed they raised their little silver heads,
And sang”
—William Butler Yeats (18651939)