What to do and how to do it; the American boys handy book (1920)
Beard, Daniel Carter, 1850-1941 · New York, C. Scribner's sons · leaf 69
flies thrown to him by hisfriend the jeweller. It is a great mistake to suppose that it isnecessary to change the water in an aquarium every few days.The tank should be so arranged as to seldom if ever require achange of water. This is not difficult to accomplish. If possible, have your aquarium… … Fig. 49. Figure 50 shows the popular, but unnatural and improper form.With a properly made aquarium, after it is once stocked withthe right proportion of plant and animal life, there is no neces-sity of ever changing the water. Both animals and plants breathe, and what is life to theplant is poison…
Amusements · Sports
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