Excerpt from Fish Culture: In Ponds and Other Inland Waters
River, stream or lake water, which during the spawning season will not fall below 55 degrees, preferably below 60 degrees, and only becomes muddy after exceptionally heavy storms, and then for a short time only, is necessary. Dur ing the breeding season, higher temperatures than those named, and water perpetually clean, are very much to be desired. At 50 degrees the fish will not spawn; and at 45 degrees both eggs and fry will die.
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