File:Goldfish breeds and other aquarium fishes, their care and propagation - a guide to freshwater and marine aquaria, their fauna, flora and management. With 280 explanatory illustrations, printed with (14786257763).jpg

Identifier: goldfishbreedsot00wolf (find matches)
Title: Goldfish breeds and other aquarium fishes, their care and propagation : a guide to freshwater and marine aquaria, their fauna, flora and management. With 280 explanatory illustrations, printed with the text
Year: 1908 (1900s)
Authors: Wolf, Herman Theodore, 1855-
Subjects: Aquariums Goldfish
Publisher: Philadelphia : Innes & sons
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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by frequently removing the excess growth. It is a goodoxygenator, as are all the vigorously growing submerged aquatics. TheCharas do not grow as well in the aquarium as the Nitellas. No other aquatics so plainly show the activity of plants in liberatingoxygen as this group, particularly Nitella. When the growth is dense instrong sunlight, the oxygen bubbles form on the stems and leaves likesuspended clusters of tiny pearls or slender strings of transparent glassbeads; and when undisturbed, the plants appear as though hung withjewels. It has been observed that the Paradise-fish seems to prefer thisoxvgen to breathing the air and will occupy itself for hours in taking theminto the mouth for gill absorption. Together with the Nitellas, Confervas and other large Algae areusually introduced into the aquarium, the principal of these being the so-called Frog-spittle, Nostocs and Zygnemae, hereafter more fully described.These seem rather to be associated with the Characeae than parasitic, and
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FIG. 122. Slender Nitella, Nitella gracilis, attached to a water soaked twig. Reduced one-third. •95 AQUATIC PLANTS OF FRESHWATER will develop even after the larger plants have been cleaned before intro-duction into the aquarium. The dense growth probably acts as a shelterfor these film-like algae or more secure anchors for their development. ANACHARIS This mosslike aquatic plant is variously known to botanists asAnacharis, Philotria or Elodea and commonly as Waterweed, Ditchmoss,Water Thyme, Water Pest and in the British Isles as Babingtons Curse.There are 4 or 5 very similar American specieswhich bloom from May to August, but are alsopropagated by a plentiful production of off-shoots which, attached or separate, rooted orfloating, grow with amazing rapidity inany ditch(stream or pond throughout the United Statesand North America except the extreme north.It is a slender wholly submerged plant withfragile jointed and branching stem, 4 inches to3 feet long, dependent upon the depth o

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