LIVING CORAL 



Astrangia danac. 



growing- plants. Then, if there should 

 be several cloudy days in succession, the 

 plants will be a virtual reservoir of 

 oxygen during the time and the animal 

 life will not suffer from lack of air 

 to breathe. 



In feeding the animal life, great care 

 should be taken not to overfeed. Take 

 time and see that the food is being- 

 eaten; if not, stop feeding, for if you 

 expect to keep the water in a healthy 

 condition all dead matter must be re- 

 moved a few hours after feeding, or 

 decomposition will take place and kill 

 the stock. 



Use for the purpose a glass tube 

 with about three-eighths of an inch 

 hole; place the thumb tightly over the 

 upper end, insert the lower end of the 

 tube in the water over the substance 

 to be removed, raise the end of the 

 thumb slightly ; the water and dead food 

 will instantly rise in the tube ; press 

 the thumb down quickly, and remove 

 the tube. If you do not wish the water 

 to waste, use a small net made of scrim, 



d&FF-'^^' '■-' " -'— 



or cheese cloth, 

 hold it over the 

 aquarium with 

 the left hand, 

 letting the con- 

 tents of the tube 

 into the net, 

 which will of 

 course retain 

 the solid mat- 

 ter ; repeat the 

 operation till all 

 is removed. 



It is well oc- 

 casionally to aid 

 aeration by dip- 

 ping up some of 

 the water, rais- 

 ing the dipper 

 six or eight 

 inches above the 

 surface pouring 

 it back; the 

 stream of water 



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SAGITTARIA 



385 



