PLANTS AND OTHER CONSIDERATIONS ^ 



T^/ 



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'1y 



y 



-WATER LEVEL 

 »QLA38 TUBINO l/2* 



.AIR BUBBLES tN TUBS 

 CAUSES WATER TO RlSg 



.END or TUBE HEAT SEALEO 

 30 T040 HOLES ABOVE SEAL 



7. The air-lift pump is of value in filtering water of 

 small individual tanks. 



Filtering Aquarium Water 



Prior to actual use in aquaria, water may be 

 filtered to remove residual chlorine, present in most 

 city water, or may be filtered to remove suspended 

 materials as well as some plants and animals when the 

 water supply is from a lake or stream. The types of 

 filters used for these purposes are discussed in Chap- 

 ter 2. The present discussion deals with filtering of 

 aquarium water for reuse. 



It should be noted that in most cases flushing is 

 more desirable than filtering and reuse. But there are, 

 of course, situations which make filtering desirable. 

 Filtering of aquarium water removes suspended mate- 

 rial, clarifies the water and may remove dissolved 

 metabohc waste such as ammonia and carbon dioxide 

 if a proper filtrant is used. The most commonly used 

 filtering system consists of an individual filter for each 

 tank. These small filters are operated in conjunction 



