Hi,
Which refractometer would you suggest to buy?
I saw the below one on eBay for 24$..
http://www.ebay.com/itm/Ocean-Salin...658?pt=LH_DefaultDomain_0&hash=item5632eef18a
Which refractometer would you suggest to buy?
I saw the below one on eBay for 24$..
http://www.ebay.com/itm/Ocean-Salin...658?pt=LH_DefaultDomain_0&hash=item5632eef18a