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#1 (permalink) |
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Saltwater Specialist
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This bogus information seems to be perpetuated by the pet shop trade. The exact source of the myth is unknown, but it seems to have started in the early 1980s. I have been told it may have originated in an article by Herbert Axelrod, but cannot confirm. No matter, the concept that keeping a marine aquarium at lowered salinity, with specific gravity of ~1.019, is commonly cited as helping to prevent disease outbreaks in saltwater fish. This idea has never been proven to help fish in any way. A specific gravity of 1.019 is far short of the level of 1.009 needed to combat ich during hyposalinity treatment. The practice may save some money for the fish supplier in it requires less salt, but it does not prevent disease. Although it doesn’t seem to hurt fish, lowered specific gravity is not good for corals and other invertebrates. They need to be maintained in the range of 1.025-1.026 for long-term health and well being. The widespread use of low salinity husbandry is why one needs to carefully acclimate new fish. If the fish is maintained at low salinity at the fish store, a sudden change in salinity can be damaging to the fish.
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#2 (permalink) |
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Goodwill Ambassador
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There are some fish that move between brackish and salt water, such as some gobies. Would it be possible to keep them in lower salinity?
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#3 (permalink) |
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Saltwater Specialist
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Well that i know of i havent heard about the gobby's travling thru brackish tho i will search and check about tha and will let you know as soon i get the info on it .
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#4 (permalink) |
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Goodwill Ambassador
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Thank you. I was reading about the stiphodons and it mentioned some 'fresh water' gobies that must travel to sea to breed and that is why aquarists have no luck breeding them.
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