stephikins Posted July 20, 2010 Report Share Posted July 20, 2010 Ok....my daughter is getting one of these and according to the internet it will need a hydrometer for the brackish water. There is both a hydrometer and hygrometer on trademe....Which do we need and what is the difference? Thanks Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted July 20, 2010 Report Share Posted July 20, 2010 you will also need to move on to a marine tank as they grow up and need to be in marine water. you need a hydrometer, which measures the specific gravity of water. pure water has a SG of 1, add salt and impurities, and that increases. Quote Link to comment Share on other sites More sharing options...
stephikins Posted July 20, 2010 Author Report Share Posted July 20, 2010 Thank you for that.... Quote Link to comment Share on other sites More sharing options...
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