304 PEESH-WATEE AQUAEIA. 



13. The different foods should be kept conveniently near the 

 aquariiun or aquaria: the animals will then run less risk of 

 being starved. 



14. No discarded food ought to be left in the tank. If 

 allowed to remain, it will be certain to corrupt the water, and 

 so considerably interfere with the welfare of the whole of the 

 inmates of the aquarium. 



15. All garden-worms should be killed (as already suggested) 

 before they are given to carnivorous fish or other carnivorous 

 animals. It is neither a pleasant nor a profitable sight to see 

 a woiin struggling with its captor, even if the creature suffers 

 no pain. Worms should also be dipped in water before they 

 are placed in the aquarium: they will not then be the cause 



• of the introduction of impurities into the tank. 



16. A dead animal or plant or any decaying matter should 

 at once, upon discovery, be removed from the aquarium. A 

 small glass tube is very useful for obtaining certain things 

 from the bottom of the water. The tube should be about ^in. 

 in diameter and a few inches longer than the water in the 

 tank is deep. It ought to be cut perfectly square at both 

 ends. Almost everything which is small enough to enter the 

 tube may be removed by it from the bottom of the aquarium. 

 The tube is used in the following way: One end of the tube 

 is hermetically closed by means of a finger, the other end is 

 placed over the object required, the finger is then suddenly 

 removed from the upper end of the tube, and the object desired 

 shoots up immediately into the tube; and if the finger be 

 returned to its former position, and kept carefuUy there, so 

 that no air can enter the tube, the object now contained within 

 the pipe may be readily removed from the aquarium. This 

 operation is very simple, and may be easily and quickly 

 performed. The tube should be kept conveniently near the 

 aquarium. 



17. Every aquarium should be covered with glass in such 

 a way that the necessary air may be able to come in contact 

 with the water, that none of the inhabitants of the tank can 

 escape, and that no dust can fall upon the surface of the 

 water. 



