io Fresh Water Aquarium 



should be treated with a good coating of 

 enamel paint, at least once a year. It is 

 most essential that the bottom be sufficiently 

 strong, not to bend under the weight of 

 gravel, stones and water. A certain propor- 



Fig. 7. Oblong glass aquarium with tin frame. 



tion should prevail between the length, 

 height and the width of all, aquariums. If 

 possible the height should not exceed the 

 length and width of the aquarium, as it is 

 important to have as large as possible a sur- 



