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Old 06-22-2006, 03:56 PM   #1
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Hydrometers! :(

My buddy gave me an instant ocean hydrometer...(I know why he gave it to me now )

It is way out of calibration......I have been told you can calibrate it wit sea water at 1.026, and then draw your own marks with a black marker where you want the salinity to be.

I have the ability to do this as I live in Daytona Beach Florida, but does it work, or should I smash it and buy a refractometer like I really want to.
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Old 06-22-2006, 03:59 PM   #2
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i would gow with the refractometer
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Old 06-22-2006, 04:02 PM   #3
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Most people on this site recommend a refractometer because they are more accurate, but I don't see what is wrong with manually reading the salinity on a hydrometer. It works perfectly fine for me and since you got it for free save yourself 40 bucks and do it the cheap way. HTH
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Old 06-22-2006, 04:08 PM   #4
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Originally Posted by EELectric
Most people on this site recommend a refractometer because they are more accurate, but I don't see what is wrong with manually reading the salinity on a hydrometer. It works perfectly fine for me and since you got it for free save yourself 40 bucks and do it the cheap way. HTH
Too bad the stupid thing gives me a reading of 1.030! 8O ...Even when I know the new water from the LFS is 1.025......

I plan on calibrating it using ocean water, I hope it works.

I had a different type about 3 years ago, which worked much better, but I have not been able to find it. Everyone one sells the instant ocean ones.

It is for a nano reef, so this is particularly important. I top off everyday, but if the skimmer is over adjusted, or some other way I loose volume of SW, I want to be able to see where I am before I throw my tank into osmotic shock 8O .......
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Old 06-22-2006, 04:21 PM   #5
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I bought a refractometer 2 months ago. It was my best investment. The thing is dead on accurate. I hated my floating hydrometers.
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Old 06-22-2006, 04:44 PM   #6
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Spend the 40.00 and get the refractometer. It will be your best investment.
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Old 06-22-2006, 04:46 PM   #7
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Agreed with other advice... refractometer all the way...
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Old 06-23-2006, 12:25 AM   #8
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Too bad the stupid thing gives me a reading of 1.030! Shocked ...Even when I know the new water from the LFS is 1.025......
Mayb u left the water somewhere for too long so some water evaporated XD
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Old 06-23-2006, 01:06 AM   #9
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The cheap comes out expensive
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Old 06-23-2006, 08:09 PM   #10
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What will using seawater do for you??? makes no sence too me.. Using your tank water is fine to calibrate it.. You need a refractometer to give you the right SG then use the hydro, you will then know how off the hydro is. The question that needs to be answered is the hydro off the same amount every time?? maybe yes maybe no.. Don't be cheap spend the $45 and get a refractometer. This is not a cheap hobby and some things should not be skimped on. I went 2 years with a hydro and at the beginning it was right on towards the end I found out I was running my reef at 1.029 thinking it was a 1.025.
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