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Old 01-08-2004, 09:01 PM   #11
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Quote:
Originally Posted by reefrunner69
Quote:
When you have a minute and have your refrac in hand, take a sample from the very top and then again from 6 inches down - you will see the difference.
Hmmmm, I've never done that before, will try it
Me either, I'll have to check it out
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Old 01-09-2004, 11:17 AM   #12
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Snapcracker,
How much difference you see? I will defintely try it, that would mean that my hand will get wet.
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Old 01-12-2004, 11:15 AM   #13
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Well when I checked on the surface a few times in the past I went "whoa, my salinity is really high!" and then I dip down 4-6 inches and sure enough it's right on the button at 1.025.

I was getting 1.027 on the surface If I remember right

The "deep six" was purportedly engineered to take samples from 6 inches down where the more accurate readings come from.

What did you guys find with your samples? Any variance?

It could have been all of those zos I was eating too you never know.
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Old 01-12-2004, 11:57 AM   #14
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I bought the deep six for this reason. Everything I read said that the surface would always give you a higher false reading.
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Old 01-13-2004, 10:45 AM   #15
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I did the experiment last night and saw no difference in salinity between 1" down the surface vs 6". Maybe, the refractometer is accurate enough to make the reading constant while those plastic hydrometer will take a better measurement at 6". Just a thought on my part.
I am very eager to wait for more experiment results from the rest. I guess this is important enough for everyone to take another look at their salinity and hopefully we can come up with a consensus.
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Old 01-13-2004, 11:19 AM   #16
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Also, it is important to remember that the plastic SG meters are calibrated for 77 degrees F. If you're water is at, say, 80 degrees F, you have to make an adjustment to the reading you get on your Deep Six SG meter.

There is a table out there somewhere that tells you the conversions, but I can't find it at the moment. I'll look around and post it here.

Todd
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Old 01-13-2004, 11:26 AM   #17
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Got this link from ReefRunner69

http://www.algone.com/salinity.htm

So if your water is 80 degrees F and your Deep Six gives you a reading of 1.024, your actual salinity is 1.0264.

HTH,
Todd
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