WHAT DO YOU USE TO CHECK SALINITY AND WHICH HAS WORKED BEST ???

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Jordan92595

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I’ve been trying to do some research on digital salinity readers but the reviews on majority have been horrendous … obviously when dealing with salinity you need to be as accurate as possible to avoid destroying your tank

thanks for your opinions


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Gtinnel

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I mostly use a Milwaukee digital refractometer and occasionally double check my reading with an optical refractometer and verify they're both right with some home made 35ppt test solution. I also have the salinity probe on my apex that monitors it (although the numer is not accurate so I just use it to look for salinity changes).

My favorite is the Milwaukee digital refractometer.
 
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Jordan92595

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So I see a lot of Milwaukee fans.. any downfalls you guys have came accross ? Calibration issues ? Cleaning issues? How accurate is each reading?? Do you notice changes if you test back to back ?
 

Gtinnel

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So I see a lot of Milwaukee fans.. any downfalls you guys have came accross ? Calibration issues ? Cleaning issues? How accurate is each reading?? Do you notice changes if you test back to back ?
It works great for me. You calibrate it with distilled water (honestly I rarely calibrate I just check it with diy test solution), just dry off the little testing well after use and clean it with rodi water (also I rarely clean it, I dry it with a microfiber towel after using it and when I go to test next I'll fill the well up with tank water, remove that water, and then put my sample on it. I don't know that it helps with any possible salt residue effecting my results but I still do it).

Accuracy is where you will see some bad things about it. According to Milwaukee it's accuracy can be off as much as +/-.002, which is a big range. If you'r sample is at 1.026 then it can theoretically read that as 1.024-1.028 which is a huge range for what we use it for. That is the reason that I almost didn't get one. The best I can say is that when I use a solution with a known salinity it reads it correctly. If I restest the same sample I get the same results everytime.

I don't regret getting one.
 

mrlavalamp

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After fighting with calibration and trying to keep my red-sea optical refractometer accurate, I just gave up on it.

The tropic marin high precision is by far the best simply because it cannot drift.

No mucking about with creating/purchasing standards, no guessing games, no questions, just accurate readings every single time.

The only down side is that it is glass and therefore fragile.
 
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PICK the Most Tested & Least Tested Parameters of your Tank (Pick 2)

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  • Alkalinity (most)

    Votes: 105 75.5%
  • Magnesium (most)

    Votes: 1 0.7%
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  • (least) Phosphate

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  • (least) Nitrate

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  • (least) Ammonia

    Votes: 56 40.3%
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