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Old 08-23-2015, 06:33 PM   #31
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Refractometer needs to be calibrated so often and it will also give you false reading at the wrong temperature. I never have a problem with swing hydrometer. In fact I switched from refractometer to swing. The trick is to swing it several times until it stabilizes and settles down.
I undestand perfectly how to use a swing arm hydrometer. Mine did not give consistent readings no matter what i did.

My refractometer on the other hand has always been consistent. Its still perfectly calibrated after a year and a half of use. Even if it wasnt calibrated it will still give consistent readings.
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Old 08-23-2015, 07:22 PM   #32
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I undestand perfectly how to use a swing arm hydrometer. Mine did not give consistent readings no matter what i did.

My refractometer on the other hand has always been consistent. Its still perfectly calibrated after a year and a half of use. Even if it wasnt calibrated it will still give consistent readings.
A bad test equipment doesn't justify a conclusion that they are all bad and unreliable. A bad swing arm hydrometer is as bad as a defective refractometer.
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Old 08-23-2015, 08:25 PM   #33
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A bad test equipment doesn't justify a conclusion that they are all bad and unreliable. A bad swing arm hydrometer is as bad as a defective refractometer.
That's a fantastic point. However, when you spend $12 on a hydrometer that you later find out is completely inaccurate which confirms exactly what dozens of people have been telling you about them; are you going to go and spend another $12 on a second hydrometer or are you going to instead spend $25 on an refractometer which the entire reefing community trusts?

How about test strips? Are you going to use them later to find out they are inaccurate then go out and buy more just in the hopes that the next batch will be better despite the reefing community telling you otherwise?

With the minuscule difference in price between a refractometer and hydrometer why would we trust hundreds to thousands of dollars in living creatures to save $13?
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Old 08-23-2015, 08:33 PM   #34
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I tested water with 2 swing arm hydrometers and one said .021, and the other said .030.....hardly a couple points. Just sayin!
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Old 08-23-2015, 08:39 PM   #35
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I tested the same water with a refractometer a few minutes apart and the reading is not consistent. Can anyone explain why?
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Old 08-23-2015, 08:42 PM   #36
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Usually air trapped on the swing arm.

Either way, the OP's question has been answered at this point and we are quite off topic. Thread closed.
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