TROPICAL AQUARIU M FISHES 237 



Don't use unmixed raw water from the taueet. The excess of oxygen is 

 undesirable. 



Don't fail to join an aquarium society, cither as an active or a correspond- 

 ing member. 



Don't place daphnia in the aquarium witliout first lookini;- carefully for 

 insect enemies. 



Don't fail to thoroughly disinfect an aquarium in which there has been a 

 contagious disease. 



Don't tear up the plants in trying to catch a fish. A little patience will 

 avoid later regrets. 



Don't be stingy, but give away a lew interesting fishes to those who 

 might become fanciers. 



Don't keep goldfishes and tropicals together. They may not quarrel, but 

 the appearance is not good. 



Don't throw away dead rare fishes. Preserve in alcohol. Scientific insti- 

 tutions are glad to have them. 



Don't always use chemicals on a fish a little out of condition. A change 

 of aquarium or of food may be all that is necessary. 



