CHAPTER VII. 



IMPLEMENTS FOR THE CARE 



AND KEEPING OF THE 



AQUARIUM. 



"UMBERLESS more or less com- 

 plicated appliances have been, and 

 are offered for the aerating, heating 

 or cleaning of the aquarium. The aerating 

 especially has given cause for the con- 

 struction of different little machines, some 

 doing the work by air-pressure, others by 

 miniature steam generators, some effecting 

 the aerating by forcing air through the 

 water, others by squirting fine jets of water 

 into the aquarium. To add beauty to 

 utility, fountains have been connected with 

 some of these different appliances. While 

 all these implements may be very interest- 

 ing toys and while some may even have a 

 limited value, they certainly are not neces- 

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