THE PROPORTION of the fresh water fish in the world is very small -around two percent.Most of the world's water is in the oceans.But because of the diverse location , accessibility and differing qualities of fresh water , the variety of fresh water fish is vast.Fresh water fish can cope with a wide range of water locations, qualities ,temperature and this adaptability and resilience has made them hardy and very suitable for life in aquarium.
Types Of The Fresh Water
When water falls from clouds as rain, it is conditioned by the earth upon which it lands.This , in turns, effect the local fishes' tolerance of their water conditions.If water falls on granitic rock,its composition is altered very little and it remains soft.But when it permeates limestone,it absorbs calcium and make it alkaline and hard.Peaty soil will acidify water, as will the rotting vegetable typically found in slow-moving streams,including most aquarium fishes, such as barbs and rasboras,will, therefore ,tolerate acidify in their aquarium water.Lakes with no inflow or outflow of water from rivers,as in Rift Valley of Africa, have a high mineral content that must be emulated in captivity using commercial mixes.Estuarine waters are regularly altered by tidal additions sea water,and fishes from these environments , such as Mono and Scat, appreciate a small addition of salt in their water.By the time of rain water reaches the sea, it is of an entirely different composition.Once there, it evaporates and begins its journey back through the water cycle.
Effect Of Temperature
Changes in temperate may also significantly alter fresh water habitats: where the volume of water is small, the differences between day and night temperatures is greater.More drastic fluctuations include the melting of mountain snows, which add cool water to rivers.
Types Of The Fresh Water
When water falls from clouds as rain, it is conditioned by the earth upon which it lands.This , in turns, effect the local fishes' tolerance of their water conditions.If water falls on granitic rock,its composition is altered very little and it remains soft.But when it permeates limestone,it absorbs calcium and make it alkaline and hard.Peaty soil will acidify water, as will the rotting vegetable typically found in slow-moving streams,including most aquarium fishes, such as barbs and rasboras,will, therefore ,tolerate acidify in their aquarium water.Lakes with no inflow or outflow of water from rivers,as in Rift Valley of Africa, have a high mineral content that must be emulated in captivity using commercial mixes.Estuarine waters are regularly altered by tidal additions sea water,and fishes from these environments , such as Mono and Scat, appreciate a small addition of salt in their water.By the time of rain water reaches the sea, it is of an entirely different composition.Once there, it evaporates and begins its journey back through the water cycle.
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| Rift Valley of East Africa |
Changes in temperate may also significantly alter fresh water habitats: where the volume of water is small, the differences between day and night temperatures is greater.More drastic fluctuations include the melting of mountain snows, which add cool water to rivers.
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| Fresh Water Of Mexico |
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