Aquae Sulis incorporated into British legend. The thermal springs at Bath were said to have been dedicated to Minerva by the legendary King Bladud and the temple there endowed with an eternal flame. An 8th century poem in Old English, "The Ruin", describing the ruinous changes that had overtaken a Roman hot-water spring, is assumed to be a reference to Aquae Sulis. The poem was copied in the Exeter Book for transmission to future generations. Rediscovered from the 18th century onward, the city's Roman remains have become one of the city's main attractions. They may be viewed almost exclusively at the Roman
Aphanizomenon flos-aquae toxic chemicals released when cells die. Once released (lysed), and ingested, these toxins can damage liver and nerve tissues in mammals. In areas where water quality is not closely monitored, the World Health Organization has assessed toxic algae as a health risk, citing the production of anatoxin-a, saxitoxins, and cylindrospermopsin. Dogs have been reported to have become ill or have fatal reactions after swimming in rivers and lakes containing toxic "A. flos-aquae". Microcystin toxin has been found in all 16 samples of "A. flos-aquae" products sold as food supplements in Germany and Switzerland, originating from Lake Klamath: 10 of 16