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:
“Reason is a supple nymph, and slippery as a fish by nature. She had as leave give her kiss to an absurdity any day, as to syllogistic truth. The absurdity may turn out truer.”
—D.H. (David Herbert)
“But when a man poured fish into a pile,
It seemed they raised their little silver heads,
And sang”
—William Butler Yeats (1865–1939)
“I love meetings with suits. I live for meetings with suits. I love them because I know they had a really boring week and I walk in there with my orange velvet leggings and drop popcorn in my cleavage and then fish it out and eat it. I like that. I know I’m entertaining them and I know that they know. Obviously, the best meetings are with suits that are intelligent, because then things are operating on a whole other level.”
—Madonna [Madonna Louise Ciccione] (b. 1959)