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Old 11-16-2005, 04:57 PM   #1
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new refractometer

I finally decided to take everyone's advice and ordered a refractometer, which just arrived. Yikes! I had a swing-arm hydrometer and have been keeping the sg at 1.023. I just calibrated the refractometer with distilled water (didn't have to adjust it actually) and tested my tank water... it says I've got it at 1.030, or 40 ppt! I obviously have some adjusting to do. How fast or slowly should I bring down the salinity?

And by the way, are all refractometers created equal? And all to be trusted over hydrometers?

This is the one I got (it was only $34.99 at the time):

http://www.drsfostersmith.com/produc...lpartial&Np=1&pc=1&N=0&Nty=1
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Old 11-16-2005, 05:08 PM   #2
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That model has worked fine for me for many months so far.

Bring your sg down about .002/day with ro/di water. In two days you'll be at 1.026 and your tank will feel far less stress. Third day at 1.024 and you'll be perfect! I keep mine at 1.024/1.025.
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Old 11-16-2005, 08:37 PM   #3
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Thanks, Runway!

I've already started to add a little fresh water to my tank.
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Old 11-16-2005, 10:18 PM   #4
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You could bring it down in one day but I would recommend doing it slower. They can handle a drop much better than a rapid increase. As runaway said 2-3 days would be ideal. I have dropped from 1.023 to 1.011 in two days on several occasions with no problems.
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