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Old 03-26-2005, 07:17 PM   #1
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hydrometer reading

my hydrometer reads 1.020 is this level okay? is this to low or to high? should i add more salt or RO water???
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Old 03-26-2005, 07:36 PM   #2
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1.020 is fine, it is on the low end of the "acceptable range" (about 1.020-1.024), but some like to keep it higher for their reefs like up to 1.023, that is where mine it at right now.
but the main thing is: if you want to get it higher you must do so veeerry gradually, like over a couple of days because a sudden change in specific gravity can really stress the fish out.
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Old 03-26-2005, 07:53 PM   #3
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I dont have any fish in the tank just Live rock, snails, and some hermit crabs.
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Old 03-26-2005, 08:48 PM   #4
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well then it is not as big a deal but you still want to take it a little slower, meaning not just dumping a bunch of salt in, maybe only boosting it .001 over an hour or so, and eventually bringing it up to 1.022, which is good.
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Old 03-26-2005, 10:42 PM   #5
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Most people I know run there reefs around .024-.025
A FO tank you can run lower ....
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Old 03-27-2005, 12:04 AM   #6
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true true, just goes to show that it is (to a small extent) your personal preference
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Old 03-27-2005, 01:43 AM   #7
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I run mine at 1.024 but your fine for now, just next water change raise it up a little.
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Old 03-27-2005, 01:53 AM   #8
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thanks everyone ill def. gradually add a lil more salt
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Old 03-27-2005, 08:16 AM   #9
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Also what brand of hydrometer do you have? I have the Coralife Deep Six that I checked against the LFS refractometer. Although a hydrometer is not very accurate, they are consistent on their readings. In their water the refractometer read 1.024 where my hydrometer read 1.0215. So now that is what I shoot for. The guy at LFS said most hydrometers read a little low. I would get yours checked against a refractometer. Then you know what SG your water is without paying the price of the refractometer.

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Old 03-27-2005, 10:49 PM   #10
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Quote:
In their water the refractometer read 1.024 where my hydrometer read 1.0215
That was about my experience when I got a refractometer. My hydrometer was .004 low so when I thought my tank was at 1.023 it was really at 1.027. Hmmmm. For the price of a refractometer I wouldn't use a hydrometer, personally. It stands to reason that over time, if the hydrometer weren't kept completely salt free it would begin to accumulate very slowly a filmy layer at a time and the hydrometer would actually start reading lower and lower (but this is just a hypothesis). I wouldn't trust them as far as I could... well I wouldn't trust them even that much, lol!

If I was going to use a hydrometer I would err on the low side because I've never heard a case of them reading higher than a refractometer and most people who've commented say that their hydrometer was .004 low.
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