. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. Fig. 128. Tubifex Worms (Magnified, and as they appear to the naked eye) causing a circulation of water about themselves by a constant weaving motion. When alarmed they draw back into the case. They are exten- sively cultivated in Europe as a food for tropical fishes. A similar variety is often introduced into goldfish aquaria when feeding daphnia, where they become an unsightly nuisance, for goldfishes cannot catch them. To get rid of them it is necessary to boil or renew
. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. Fig. 128. Tubifex Worms (Magnified, and as they appear to the naked eye) causing a circulation of water about themselves by a constant weaving motion. When alarmed they draw back into the case. They are exten- sively cultivated in Europe as a food for tropical fishes. A similar variety is often introduced into goldfish aquaria when feeding daphnia, where they become an unsightly nuisance, for goldfishes cannot catch them. To get rid of them it is necessary to boil or renew the sand or else keep other fishes in the aquarium for a long time. The worms have to be eaten off many times before the stock dies. Germicides strong enough to kill them will also destroy the plants, as they can withdraw into the sand. Along the edges of ditches they are often so numerous as to make a solid rusty- red color. If they are scraped up together with the mud and then washed free they are greatly enjoyed by gold and tropical fishes, but it is inadvis- able to introduce them where there is sand or Fig. 129. Freshwater Shrimp (Enlarged three times) Fairy Shrimp (Gammarus). While freshwater shrimp is not plenti- ful enough anywhere to feed in large quantities, it is a delicate morsel for. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Innes, William T. (William Thornton), 1874-1969. Philadelphia, Innes
Size: 1933px × 1293px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorinneswil, bookcentury1900, bookdecade1920, bookyear1921
