Red sea hydrometer

Discussion in 'Test Kits, Controllers, Reactors and Dosers' started by magman, 14 Aug 2010.

  1. magman

    magman

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    Hi guys,

    I got a new Red Sea hydrometer today, but it shows my salinity is basically off the chart, above 31, it gives that under tap water too. Does it need any prep like the others. I have the plug in for the quick reading and out for the permanant in tank reading, any one got advice please on these hydrometers please.
     
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  3. lIghty

    lIghty

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    Once filled with water, give it a good tap/flick as mose times micro bubbles stick to the needle, also just let it stand in some RO with vinigar to remove and manufacturing oils.

    Aslo, I don't advise leaving them in the tank/water, as most time some algae grows on the needle making it unausable.
     
    Last edited: 14 Aug 2010
  4. Nemos Janitor

    Nemos Janitor

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    Bud why you messing around with a hydrometer?? They are so temp & altitude sensitive and inaccurate + you will break many in your water testing career. Rather go with a quality ATC refractometer or a if you can afford, Conductivity Meter. By far the better option in the long run. IMO
     
  5. Trev

    Trev

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    Must agree with Nemo most hydrometers are horribly inacurate at the best of times. That said we need a source for well priced refractometers in SA the current prices are a bit of a rip off IMO
     
  6. vatso

    vatso

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    I have a Tropic Marine one cost like R600+ they worth the money - you always going to use it
     
  7. magman

    magman Thread Starter

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    I should of got one in Durban today.....:(

    Thanks for your guys help, right now the salinity has dropped to 30 for the DT, and the tap water is 18, will rinse in sink with Vinigar now (thanks Justin)
     
  8. vatso

    vatso

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    Go to pet shop or reefer & calibrate your Red Sea
     
  9. gaboon

    gaboon

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    Here's a tip, if you have an hydrometer, compare it against a mates refractometer and go from there. Cheap chaep. My R30 hydrometer was spot on for 4 years until I dropped it.;)
     
  10. magman

    magman Thread Starter

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    sorry guys, I think it is a refractometer, the hydrometer is the one that floats? This what I got today was R300
     
  11. magman

    magman Thread Starter

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    I'm lying, sorry hydrometer
     
  12. Manic

    Manic Moderator

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    Depends what hydrometer you have. The tropic marine pro hydrometers are used to calibrate refractometers. The cheap hydrometers are useless though.
     
  13. viper357

    viper357 Admin MASA Contributor

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    You got this?

    [​IMG]

    Agreed, get Mekaeel or someone with a refractometer to compare with, they can be extremely fiddly, just the smallest of air bubbles on the swing arm will affect the reading.
     
  14. vatso

    vatso

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  15. viper357

    viper357 Admin MASA Contributor

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    p.s. for R300 I think you got seriously ripped off, I'm sure those things are about R170 or less?
     
  16. gaboon

    gaboon

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    TM hydrometers cost R400, I'm talking about the R30 cheapies, calculate the difference against the refractometers, then you have a calibrated hydrometer
     
  17. magman

    magman Thread Starter

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    Thanks Dean, that's the one. Who is Mekaeel, never heard of him?

    It's showing my salinity at .27, but it helps if you tap it a million times against the glass
     
  18. vatso

    vatso

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    Really it's worth investing in a good one as we use them all the time & every time we do water changes
     
  19. Nemos Janitor

    Nemos Janitor

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    The Tropic Marin hydrometer is accurate and calibrated at sea level. 0 gravity, It's recommended range is also 1,021 to 1,024. It is very accurate at 0 altitude and 20c. So when testing your water, these prams need to be observed.

    Has any one sent there Tropic Marine hydrometer or refractometer or conductivity meter to SABS for calibration and certification? I would be very interested to find out the error variance at 850m above sea level and at 23 - 27c with the various DO contents.:)

    No hydrometers are never used to calibrate refractometers. Substances of specific light reflectance are used.
     
  20. deadmeat2016

    deadmeat2016 Wouter

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    Bought mine for R115 at panorama petshop, stil have the receipt :) the red sea hydrometer that is, since then i got a refractometer, it has been a very vital and dependable piece of kit, even went to the red sea with me.

    If it isnt better than a hydrometer, ill eat my plakkie
     
  21. gaboon

    gaboon

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    swingarm hydrometers suck, I found out the hard way as well.
     
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