Does Java fern grow faster in salt water or fresh?

The use of term salt water is ambiguous . How salty is that salt water ? Java fern tolerates BRACKISH WATER . It will not grow in sea water if that is what you mean.



Kindly read the matter on the link below ==

http://www.wetwebmedia.com/BrackishSubWe...



http://www.wetwebmedia.com/PlantedTksSub...



The problem of dehydration caused by osmosis means that the variety of plants that can adapt to brackish water conditions is somewhat limited.



Generally, plants with tough, waxy leaves



such as Java fern, vallis and sagitaria do best.



Other factors in some brackish water aquaria can also be detrimental to the cultivation of healthy plants.



As mentioned earlier, most brackish water species prefer water movement ... typically, however, plants do not.



Many brackish water fish species commonly kept in aquaria are, to a greater or lesser degree, herbivorous and can do untold damage to a well-planted tank.



http://www.iowas.co.uk/Brackish.html

http://www.csd.net/~cgadd/aqua/ah_main/d...



The statement in the link below that java fern " Can live in brackish water" clearly indicates that Java fern is salt tolerant and not salt lover ,



Kindly click on the link below and read ' environment specifics ' therein ====

http://www.theaquariumwiki.com/Java_fern

Does Java fern grow faster in salt water or fresh?
There are different varieties of Microsorum pteropus,a freshwater plant and from var 'Philippine' only is reported:

An interesting bit from Tropica.com: "It is tolerant of salt, and originated from the island of Panay in the Philippines, where it grows right out in the tidal river mouth and thrives both below and above water." (http://www.thegreenaquarium.com/articles...

And another publication says: "Microsorum is more salt tolerant than many plants, and is often collected from brackish water areas." (http://www.csd.net/~cgadd/aqua/ah_main/d...



So it tolerates salt but should grow faster in its natural freshwater environment.