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Old 07-27-2013, 11:35 PM   #1
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best hydrometer is....?

hi AA. I'm a noob when it comes to SW. I have read somewhere here that a quality hydrometer makes a difference in the water condition and future impact on your reef tank. what's a good/quality brand hydrometer? i also understand there's different types of hydrometer and which ones are you using?
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Old 07-27-2013, 11:38 PM   #2
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Use a refractometer. Try bulk reef supply or amazon for one.
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Old 07-27-2013, 11:55 PM   #3
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something like this?

Automatic Temperature Compensating Refractometer - AUTO TEMPERATURE COMPENSATING REFRACTOMETER: Amazon.com: Industrial & Scientific

sorry but i have no idea what temperature compensation means in SW
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Old 07-27-2013, 11:58 PM   #4
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Quote:
Originally Posted by huizheng1988 View Post
something like this?

Automatic Temperature Compensating Refractometer - AUTO TEMPERATURE COMPENSATING REFRACTOMETER: Amazon.com: Industrial & Scientific

sorry but i have no idea what temperature compensation means in SW
If I was gonna buy one that would be the one I would choose. But I am a newbie myself. Lol
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Old 07-28-2013, 01:59 AM   #5
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Check out ebay for the same thing. Just saw one for $30. I use the same one and it is really accurate and soo much better than a hydrometer.
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Old 07-28-2013, 04:15 PM   #6
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Many people use a hydrometer for saltwater tanks. While they have problems being completely accurate, they do function for ballpark figures which is all you really need them for. The time comes when you truly need a refractometer when you have to do something like a hyposalinity treatment which requires very precise measurements.

I would highly suggest a refractometer over a hydrometer, but at the same time its not 100% necessary.

As for a decent brand I would take a look at the instant ocean hydrometer.
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Old 07-28-2013, 04:49 PM   #7
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When dealing with smaller tanks I think a refractometer is necessary. A ballpark number can be deadly in a small enough tank.
In larger tanks I agree it isnt a necessity, but since a hydrometer is like $10 and a refractometer is $30 why not spend the extra $20 to get the accuracy? I guess it's what your budget can take. lol
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Old 07-28-2013, 05:46 PM   #8
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budget isn't an issue for now. i will get a refractometer. can some one explain what temperature compensation means? this is my first SW tank, i want.nothing to go wrong with it. just like a quality light fixture and filters, i.will make the investment now
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Old 07-28-2013, 05:46 PM   #9
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A hydrometer will have an inaccuracy of .003 or so. If you are doing a 10% water change and are just a smidge high in salinity due to a hydrometers inaccuracy it won't hurt anything at all.
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Old 07-29-2013, 02:31 AM   #10
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Quote:
Originally Posted by huizheng1988 View Post
budget isn't an issue for now. i will get a refractometer. can some one explain what temperature compensation means? this is my first SW tank, i want.nothing to go wrong with it. just like a quality light fixture and filters, i.will make the investment now
I believe the salinity varies slightly based on water temperature, but not sure..
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