reef Posted January 19, 2005 Report Share Posted January 19, 2005 INFO What is it? - A refractometer provides quick measurements that indicate the exact amount of dissolved salts in water. This rugged laboratory quality hand held refractometer is incredibly accurate and exceptionally easy to use. The dual scale precisely and consistently tests +/- 1% from: specific gravity 1.000 / 0 ppt. to specific gravity 1.070 / 92 ppt. How does it work? - Simply place a few drops of aquarium water on the prism and place the prism cover on top. Hold it towards a light. Look through the adjustable eye piece. It reads in percent and specific gravity. Ideal for hypo salinity to brine applications. An absolute must for brackish water, marine fish and reef aquarium keepers. Light travels at different velocities in different mediums. A few drops of aquarium water are placed between two pieces of light transmitting material. Light goes through a high quality optical prism. The light beam bends at different rates with different density solutions. This is called refraction. Simply looking through the eye piece will give you exact salinity and specific gravity measurements. Why do you need it? - It is well known that inexpensive glass hydrometers are grossly inaccurate. It is generally agreed that the vast majority of plastic specific gravity testers do not yield consistent or accurate results. If a hydrometer is wrong by +/- .002 or more specific gravity units, calcium test results can be inaccurate +/- 75 ppm. to 100+ ppm! Meaningful testing for all ions related to successful marine fish and reef keeping is impossible. In order to evaluate the initial quality of marine salts and/or accurately test for calcium, magnesium, alkalinity and other important ions that may require periodic supplementation, it is essential to first determine the honest specific gravity or salinity of your marine aquarium water. Without first determining honest specific gravity or salinity adding the proper amount of supplements to obtain optimal levels is at best a guess. This refractometer takes the guess work and confusion out of testing specific gravity and salinity. Quote Link to comment Share on other sites More sharing options...
chimera Posted January 19, 2005 Report Share Posted January 19, 2005 a highly recommended device to have for marine. will set you back roughly $100 - $150 odd depending on 2nd hand or new. Quote Link to comment Share on other sites More sharing options...
Duke Posted January 19, 2005 Report Share Posted January 19, 2005 Were can I purchase one in Auckland ? I have been quoted $200 + from Hollywood Farm Quote Link to comment Share on other sites More sharing options...
Brianemone Posted January 19, 2005 Report Share Posted January 19, 2005 l'internet is your friend, ive seen them for 39.95US Quote Link to comment Share on other sites More sharing options...
RnB Posted January 19, 2005 Report Share Posted January 19, 2005 I found a NZ supplier of these units about 3 months ago I was quoted $150 + GST + freight (Normal price $189 + GST). they are in CHCH. I have just asked price for 5 units from him, see what he comes up with. but on 5 units from the US the frieght go down quite low..... I think it best to import 10 direct from the chineese manufacture and flog em that way..... would anyone be interested Please PM me..... Quote Link to comment Share on other sites More sharing options...
Fay Posted January 23, 2005 Report Share Posted January 23, 2005 Added a refractometer to equipment; Tested water and had a FIT!!! The hydrometer I have been using reads 1.020 when the water is 1.025 with refractometer. So I have been over salting the tanks for years!!!! @ 1.030 Had to do water adjustment to correct Quote Link to comment Share on other sites More sharing options...
chimera Posted January 23, 2005 Report Share Posted January 23, 2005 :lol: Quote Link to comment Share on other sites More sharing options...
ben19185074 Posted January 23, 2005 Report Share Posted January 23, 2005 Is it really a few people looking for it? If so i may think about bring some in.... Quote Link to comment Share on other sites More sharing options...
chimera Posted January 23, 2005 Report Share Posted January 23, 2005 quality and price Quote Link to comment Share on other sites More sharing options...
scholesy Posted January 30, 2005 Report Share Posted January 30, 2005 Can't go past a good refrac. If you know someone coming back from the States, Marine Depot.com do a good one for US$70, ATC (Auto Temp Compensating) Quote Link to comment Share on other sites More sharing options...
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