. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Fig. 145. Salvinia (Life size)Fig. 146. Teianea (Slightly reduced) TROPICAL AQUARIUM FISHES 193 SALVINIA Of the small floating aquatics Salvinia is one of the best. The heart-shaped leaves with bristle-like growth on the upper surface seem likebits of velvet connected by a thread. The roots are naturally long forthe size of the plant but fishes usually eat them down to about half length,which interferes with a full development of size. In the greenhousewhere they have a moist atmosphere and no
. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Fig. 145. Salvinia (Life size)Fig. 146. Teianea (Slightly reduced) TROPICAL AQUARIUM FISHES 193 SALVINIA Of the small floating aquatics Salvinia is one of the best. The heart-shaped leaves with bristle-like growth on the upper surface seem likebits of velvet connected by a thread. The roots are naturally long forthe size of the plant but fishes usually eat them down to about half length,which interferes with a full development of size. In the greenhousewhere they have a moist atmosphere and no interference they developwith amazing rapidity. The variety illustrated. Salvinia natcns, is nativeto Europe and is the form commonly used in aquaria and pools. Although it is claimed that neither Salvinia nor the common wildDuckw^eed perform any oxygenating function, the author and othershave many times seen aquaria completely covered with either of theseplants and, with no other plants in the aquarium, the fishes were gettingalong perfectly well. FROGBIT Hydrocharis morsus-ramc, requiring the
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