how do i how to convert psu salinity to ppt or specific gravity

[lizwinz]

i found a chart that has environmental information on some fish that i got recently

http://hercules.kgs.ukans.edu/websi...ce=http://64.95.130.5/map/kgs/temp/104034.xml

so i'm wondering how to use this information to create good tank conditions for them but i really dont understand it

psu? the only way i know of to measure salinity is ppt of specific gravity

i bought them as freshwater and have acclimated them to 1.004...i'm starting to think that they may need more

i really need some help figuring this out

--liz

 

[sinasster]

I beleive the psu numbers are PPT

1.004 is not PPT it is specific gravity.

these are two seperate scales that are common on salinity testers and only can be used together at certain temperatures, such as aquarium water temps.

so i beleive the specific gravity your looking for based on the psu is 1.025