01-15-2012, 07:59 PM
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I apologize to the OP for hijacking this thread, but I have one question for Byron. I tried to find a copy on the web, but I can't. Is there a link to the article anywhere? I'd really like to read it. That's an awfully small amount of salt to be considered dangerous. I've not run across anything like that before.
I had the article title and thus the issue incorrect, so I'm glad you questioned this. It is a related article that appeared in the August 1996 TFH entitled "Breeding and Rearing Mimagoniates Species, Internally Fertilized Tetras," by the same four authors. I have a rather poor photocopy of page 198 (on which the issue of salt is discussed) that I made from the copy of the magazine in the local library. If I can get my printer working I might be able to scan the page. This is the text citation:
We do not want to bother the reader with more water chemistry, but there is one more important thing to note at this time. The reader will recall that we have repeatedly noted that we have never collected species of the subfamily Glandulocaudinae in areas of streams that are subject to tidal influence of any kind. There are notes in the aquarium literature concerning fish diseases that characins should never be subjected to water containing more than 100 parts per million of sodium chloride, common salt. We think that is advice well given, but there are apparently some species of characins that are even more sensitive to salt. [The authors then relate their specific issue where increased salt being used for treatment caused the fish to go into hiding, followed by bloating, then death of a few fish each day, until the water was changed to RO water.]
There is no reference to the specific "aquarium literature" but I have frequently encountered similar statements from biologists experienced with collecting fish in South America. Dr. David Sands in his description of several new species of Corydoras in FAMA during the mid 1990's noted his observations that corydoras living in rivers and streams that are tidally influenced are never found anywhere close to the upper extent of tidal (salt) water. The fish avoid such water.