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Old 11-15-2012, 08:50 PM   #1
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Refractometer. ( geand-index)

http://www.grand-index.com/pro_detail.php?ProId=18

Anyone every purchased a refracting yet from grand index for $20?


Any suggestions?
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Old 11-15-2012, 09:20 PM   #2
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This appears to be the same one bulkreefsupply.com sells, which I own. It seems to be a good tool. No complaints from me on it.

EDIT: Please don't post duplicate threads. The threads weren't showing because you are a new member and had a link in the thread - it causes new posts to go into a queue for approval. We do this to eliminate spammers.
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Old 11-16-2012, 08:31 AM   #3
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as long as you calibrate it and check it every so often, you should be fine
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Old 11-16-2012, 08:42 AM   #4
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I bought it works like a charm and calibrated it with 5 stage ro di water ...IMO the calibration fluids a waste of money I tested with rodi water and the fluid and there was no difference
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Old 11-16-2012, 08:48 AM   #5
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Refractometers are best calibrated in the range of its intended use. Use a 35 ppt reference for measuring reefwater
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