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#2
04-25-2008, 02:47 PM
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The article describes how to make your own solution. I did so quite a while ago and was pleased to find that my refractometer was dead on at 1.026. I had also initially calibrated it with RO water. I imagine there can be some variation in manufacturing tolerances with these low cost units which would necessitate calibrating it to the desired reading instead of to 1.000. I'm sure if you've sprung for a high end lab grade unit, this would be less of an issue.
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I retired and got a fixed income but it's broke. Ed _______________________________________ 50 gallon FOWLR, 10 gallon sump. 130 gallon reef, 20 gallon sump, 10 gallon refugium. 10 gallon quarantine. 60 gallon winter tank for pond fish. 300 gallon pond with waterfall. 
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#4
04-25-2008, 03:26 PM
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I use RO as well....I might have to give this a shot...
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60 Gallon rimless, internal Herbie overflow, ATI Powermodule, Eheim 1250, 2X Tunze 6055, Tunze ATO, Euroreef RS100, Profilux controller, TLF Reactor.
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#7
05-16-2008, 03:09 PM
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I think you are okay. Most instruments are have a tolerance range. So you can be off on Temperature. Just as long as you do not mix salt at below 15 and I would say not much above 20C. Just be consistent when you make a batch of saltwater up.
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#8
05-16-2008, 03:20 PM
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Quote:
 Has anyone noticed a change in reading as the sample cools on the refractometer? I think the specific gravity may change with temperature, but not the refractive index.
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#9
05-16-2008, 03:54 PM
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There's quite a large difference in the reading if you don't bring your sample up to (or down to) 25C - the temperature at which your calibration solution should be in order to get a reading of 35ppt. So bring the temperature of the solution up to 25C by placing the bottle in some hot water and then letting it come down while resting at room temperature.
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SPS Dedicated 24x24x20 Trimless Tank | 20 g Sump | Bubbble King Mini 160 Protein Skimmer w/ Avast Swabbie | NP Biopellets in TLF Phosban Reactor | ATI Sunpower 6 x 24W T5HO Fixture | EcoTech Vortech MP20 | Modified Tunze Nanostream 6025 | Eheim 1260 Return Pump | GHL Profilux Standalone Doser dosing B-Ionic | Steel Frame Epoxy Coated Stand with Maple Panels embedded with Neodymium Magnets "Mens sana in corpore sano" Last edited by Canadian; 05-16-2008 at 03:56 PM.
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#10
05-16-2008, 04:01 PM
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Quote:
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Hybrid Mode
