SALT WATER AND FRESH WATER

[Chummybumby]

Hi,
I just have a stupid question to ask. I have always been wondering about what if you put freshwater fishs in a freshwater fish tank with tropical fishes?,, or what if you put freshwater fishes in a saltwater fish tank? what would happen?
And is there any salt/freshwater fishes which can be in either tank ??

 

[Ron]

The fish would probably die if they were put into wrong conditions. And if they didn't die they would be extremely stressed and not have a healthy life, they would prone to disease. Somekinds of fish can live in freshwater as a juvenile, but must be tranfered to brackishwater or saltwater. HTH.
Ron

 

[Phase2]

I will probably be shot for this but I have success fully put goldfish (cold water) into my tropical tank with no problems at all. I have also heard that all tropical fishcan be put into a marine(salt water )tank if introduced to the enviroment change in small changes (but Im unsure if this is true) . But, I have also read that fish such as Mono's will live readily in both tropical and marine enviroments so I'm sure its possible.....but what would be the point?. I dont think you can revert true Marine fish to live in a tropical freshwater enviroment.....but maybe others know far more than myself.....

 

[Dragonslair]

I have an equally stupid question to pose. WHY?
It is fine to put cold water fish into tropical conditions although this will shorten its lifespan due to the higher heart rate. Once accustomed to the higher temps. it will not be possible to return the fish back to cold water-especially in the U.K. The sudden cold will kill them.

 

[Alien Anna]

I will probably be shot for this but I have success fully put goldfish (cold water) into my tropical tank with no problems at all.

The problems of a cold water fish in warm water are cummalative and long-term. It's like keeping a human in bad conditions - it won't kill them overnight, but that dosen't mean its good for them. Long term, the goldfish will be deprived of oxygen because warm water holds less oxygen than cold and the goldfish's immune system will be adversely affected.

I have also heard that all tropical fishcan be put into a marine(salt water )tank if introduced to the enviroment change in small changes (but Im unsure if this is true) .

Brackish fish, such as mollies and puffers can be adapted to marine conditions, but generally these are estuary fish who in nature are adapted to varying levels of salinity.

 

[guppymonkey]

I have also heard that all tropical fishcan be put into a marine(salt water )tank if introduced to the enviroment change in small changes (but Im unsure if this is true) .

This is not true at all, some brackish fish can be adapted to salt water but no other freshwater fish can. The osmotic pressures are completely different and the fish would die almost immediately. It would be really cruel to ever do this to a fish.

is fine to put cold water fish into tropical conditions although this will shorten its lifespan due to the higher heart rate. Once accustomed to the higher temps. it will not be possible to return the fish back to cold water-especially in the U.K. The sudden cold will kill them.

Any fish would die if you just threw it from a tank of one temperature and put it in water that was completely different.

 

[Ron]

They wouldn't die in all cases, most likely just be stressed and have a shorter life span. I've seen coldwater fish in tropical aquariums.
Ron

 

[Phase2]

There are many fish ...such as mono's that require some saline(salt) as they grow.....would adding salt for these type of fish be detrimental to other fish in the same tank that dont require this enviroment?