Abstract
The importance of observing the hydrogen ion concentration in the aquarium is now fully recognised. Both the Aquarist and Pond Keeper of January-February 1933, and the Aquarium Review of December 1932, include articles on this subject (“PH Values, Their Meaning and their Significance to the Aquarist”, by J. F. Corrigan. “The Aquarium and pH” by L. C. Mandeville). The same number of the Aquarist contains notes from the Brighton Aquarium by the Curator, Mr. George W. Weller, and notes from the Zoological Society's aquarium by the Director, Mr. E. G. Boulenger. In the Brighton Aquarium there are now living one hundred and twenty herrings; also an angler, Lophius piscatorius, which is very difficult to keep alive and one of the most voracious of all fishes. Mr. Lester L. Swift gives a very interesting account of the American tropical fishes belonging to the genus Mollienesia, and how to keep and rear them. These fishes are viviparous but somewhat difficult and irregular in breeding in captivity. They require much vegetable food as well as animal, and a certain kind of slimy alga, known as ‘frog-spit’, is apparently essential to the raising of healthy broods. A female may have 2-10 young every few days for a month or she may have a litter once a year or once a month for several months in succession.
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Aquaria. Nature 131, 270 (1933). https://doi.org/10.1038/131270c0
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DOI: https://doi.org/10.1038/131270c0