. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. AQUARIUM MANAGEMENT 15 the young fall into the water. Young and old must be fed on lettuce leaves. They will quickly ruin aquatic plants. These snails have a general resemblance to the Japanese variety as to size and style, but have a richer, deep brown color and longer, more graceful horns. Altogether it is a very handsome snail. They are equipped with an extremely long air-breathing tube, with which they can reach fully two inches to the surface. The frog tadpole has been
. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. AQUARIUM MANAGEMENT 15 the young fall into the water. Young and old must be fed on lettuce leaves. They will quickly ruin aquatic plants. These snails have a general resemblance to the Japanese variety as to size and style, but have a richer, deep brown color and longer, more graceful horns. Altogether it is a very handsome snail. They are equipped with an extremely long air-breathing tube, with which they can reach fully two inches to the surface. The frog tadpole has been used by many as an aquarium scav- enger, but its value is of considerable doubt. They dash about the aquarium in an aimless manner, keeping the water stirred up and the natural sediment agitated. Furthermore, they soon learn to eat fish food, and, after that step in education, the}' refuse to consume the less desirable particles found in an aquarium occupied by fish. Another scavenger is the freshwater mussel. The chief value of. the mussel is to keep down the vegetable growth which causes aquarium water to turn green. Mussels are equipped with a sort of siphon arrangement, by which they suck in water in one opening and. Fig. 7. Freshw-mer Mussel, Showing Water Int-»lke .\nd Outlet; Also "Foot" With Which It Burrows and Travels eject it from another. In the few moments which they hold the water they extract from it the floating vegetable organisms. Two or three mussels should keep a ten-gallon aquarium free of green water. Care should be taken to occasionally see whether the mussels are living, as they decompose very rapiflly and spoil the aquarium water. This can be done by tapping lightly on the shell and seeing whether they respond by closing. A curious and useful scavenger is an eel-like fish called the Weatherfish. Varieties are native to Europe and Asia. They are freely imported and inexpensive. When not scouring the aquarium bottom for bits of decomposing mat
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