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Old 02-10-2012, 12:43 PM   #11
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Not accurate at all seen it used and there terrible.
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Old 02-10-2012, 03:21 PM   #12
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A quality floating hydrometer would be much more accurate. Of course a quality lab grade hydrometer would be about half the cost of a refractometer and as it's made of glass it could break in the aquarium.
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Old 02-10-2012, 09:34 PM   #13
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I use a hydrometer it's accurate if your good at reading it I compared it to a refractometer and it's dead on.
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Old 02-10-2012, 09:53 PM   #14
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Quote:
Originally Posted by EriksFish315
I use a hydrometer it's accurate if your good at reading it I compared it to a refractometer and it's dead on.
My hydrometer is dead-on with my lfs owner's refractometer. I usually just make sure that I don't introduce air bubbles to the arm hen I take a reading.
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Old 02-10-2012, 10:33 PM   #15
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Yeah I like the floating one I use.
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Old 02-10-2012, 10:45 PM   #16
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I've also found rinsing it with fresh water after use prevents salt residue from building up inside of it.
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Old 02-11-2012, 01:01 AM   #17
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Rinsing in freshwater is an absolute must for the swing arm hydrometers. However, try testing 3 times in a half hour and tell me what readings you get. I found they are not consistent and therefore unreliable.

I calibrate my refractometer once every few months, or if I think a reading may be off. It takes under a minute to check it and I know it's accurate. Stable SG is one of the most important parameters to maintain. For the few extra dollars on a device that lasts seemingly forever is well worth it.
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Old 02-11-2012, 01:06 AM   #18
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Thanks to this thread I'll be buying a refractometer over the weekend whether online or in store but I'm getting one.

Thanks for the thread.
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Old 02-11-2012, 07:17 AM   #19
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My floating hydrometer is awkward to read. The swing arm is fine if rinsed with freshwater and no bubbles are in it. Considering my tank is rather small, doesn't contain live corals, and will only have a few inhabitants, it will do just fine. I am however planning on purchasing a refractometer, but only when I can afford to do so. Thanks for the shared info guys.
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Old 02-11-2012, 11:55 AM   #20
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Yeah all the info and knowledge you can acquire is helpful.
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