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Old 07-08-2007, 04:08 AM   #11
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Sorry to hear that. You can get refractometers fairly cheaply these days. Drsfostersmith.com has a decent one for ~$45. It's definitely a wise investment if you plan on housing corals or other sensitive inverts such as shrimp, starfish, etc. Plastic swing arm hydrometers, as well as the small floating glass ones sold for hobby use, tend to be inaccurate, especially over time or without proper care. I have seen many post about people finding their tank SG is +/- .003 or worse, when comparing their old hydrometer results vs. a refractometer. HTH
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Old 07-08-2007, 07:52 AM   #12
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Mike is right . Refractometer is the way to go. Here is the one I got. Not too bad.

http://www.drsfostersmith.com/Produc...&N=2004+113761
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Old 07-08-2007, 02:05 PM   #13
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Thanks I picked one up yesterday!
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Old 07-08-2007, 09:10 PM   #14
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I keep my salinity at 1.024 and it takes a little over 10 cups per 20 gallons to get to that level. I add the salt and test as soon as it has dissolved. If reading is low (which is usually the case because I'd rather start with too little salt than too much) I add more salt and test again in about an hour or so.
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Old 07-09-2007, 10:40 AM   #15
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I would keep my QT the same salinity of the LFS, less acclimation in getting it into the QT. Once they are in the QT you can slowly bring up the salinity to the same as your display tank and then you have less stress in acclimation to the new tank...
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Old 07-09-2007, 10:47 AM   #16
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Refractometer VERY GOOD

hydrometer Junky.

I orderd my refractometer like a week after i got my hydrometer. The goofy hydrometer.

I deff like the Refractometer a lot more then the pos plastic thing I had.

I got the one melosu listed. Deff a good buy
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Old 07-10-2007, 01:54 AM   #17
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Once quick comment about QT salinity...

I've found that before getting a fish from a new store that you haven't purchased from, it's worked better to keep my SG around 1.024 or so. If you get a store that keeps it's tanks SG on the higher end, you're good to go. However, if you do end up with a store that keeps it around 1.020, then it's easy to just dilute down the saltier water of your QT by using freshwater. It's way easier to make salty water less salty than vice versa.

Also... don't trust what your fish store say they keep their water at. Always test the water in the bag when you get home. I've found that most in my area seem to keep it around 1.023-1.024 even though they say they keep it at 1.020-1.021.
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Old 07-10-2007, 11:25 AM   #18
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Quote:
Originally Posted by Kurt_Nelson
It's way easier to make salty water less salty than vice versa.
Wow, that is an even better idea, thanks for the suggestion!
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