3-f-O Fresh Water Aquarium 



sary to keep the aquarium in good condition. 

 The more the care of the aquarium is sim- 

 plified, and the smaller the number of im- 

 plements used, the easier will it be for the 

 amateur to succeed in his efforts as an 

 aquarist. The easier also it will be for 

 lovers of nature to study the aquatic life, 

 so interesting and fascinating and yet so 

 difficult to observe under natural conditions. 

 Therefore we mention only the most neces- 

 sary and the most inexpensive implements, 

 those that can be used by anybody and 

 everybody without the slightest difficulty or 

 long tedious experimenting. The following 

 simple and easily obtained instruments will 

 be found sufficient for the preparing and 

 keeping of the aquarium under all conditions 

 met with by the amateur. 



The Filling-tube. This, as the illustra- 

 tion shows, is a long glass tube with a fun- 

 nel-shaped widening at the top. The lower 

 end is provided with a number of upward 

 pointing prongs each with a hole on top. 



