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:
“Slow, slow, as a fish she came,
Slow as a fish coming forward,
Swaying in a long wave;
Her skirts not touching a leaf,
Her white arms reaching towards me.”
—Theodore Roethke (19081963)
“The beasts, the fishes, and the winged fowls
Are their males subjects and at their controls:
Man, more divine, the master of all these,
Lord of the wide world and wild watery seas,
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Of more pre-eminence than fish and fowls,
Are masters to their females, and their lords:
Then let your will attend on their accords.”
—William Shakespeare (15641616)
“A woman without a man is like a fish without a bicycle.”
—Gloria Steinem (b. 1934)