Faulty Hydrometer or not?

Discussion in 'Beginner Discussions' started by CW, 12 Feb 2011.

  1. CW

    CW

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    Hi there ppl.

    Id just like to know.
    Can a hydrometer be broken?

    Ive used a friends hydrometer to test my tanks water and got the tank setup going and all.

    yester day i got myself a hydrometer, extra power head and scraper.
    When i tested the water with the new hydrometer the needle went right to the top.
    OVER 1.030

    Is this possiable?

    Cw out
     
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  3. carlosdeandrade

    carlosdeandrade

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    Hi Bud,
    yeah hydrometer's can give faulty readings, get your self a REFRACTOMETER with automatic tempreture calibaration (ATC). I got mine on e-bay, with shipping and landing taxes it cost me only R410, they are worth their weight in accuracy. I have a RSM Hydrometer and could never get an accurate reading, with my refractometer I discovererd it was off by 0.02, big difference.
     
  4. CW

    CW Thread Starter

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    I know a refractometer is the best but dont have buck now.
    Just got a chiller.

    But im not talking of just a 0.02 dif. Im talking about the hydrometer giving a reading wich is not even on it. Right over the top man. Hectic ...t.

    Cw out
     
  5. Q89

    Q89

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    CW, this happened to me as well, tiny bubbles get stuck between the needle and the casing, making the needle very light and giving you funny readings, try tapping the hydrometer, it might help
     
  6. CW

    CW Thread Starter

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    No im talking about the neadel going up to 1.025 every time. Then when i got a new hydrometer the reading is above 1.030 were the needle can go no were else.
    Right to the top.

    Cw out
     
  7. Q89

    Q89

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    That is strange, faulty hydrometer maybe
     
  8. CW

    CW Thread Starter

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    Cos two of my corals started to sulk. I dont know if it was the heat that one day or the salinaty.

    Then another thing.
    Ive got a 300L tank.
    When i mixed a 10kg red sea salt into the tank it still tested as 1.018 (with the old hydro meter).

    Then ive added another 4kg. Still not at 1.025.
    Then got another 10kg and added aboutalmost half of the bag.

    So thats also why i think the old hydrometer might have been faulty.
    My fish are ok. Its just the finger coral and the pink colt that looks bad.
    Ive draigned the return chamber yesterday and just added RO.
    Now with the new hydro meter ive got a 1.030 reding.

    Cw out
     
  9. Darryl

    Darryl

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    Your corals should not be stressed if you have a chiller.

    It sounds like you are using a "plastic box" type Hydrometer. They are not calibrated properly. The best thing to do is to compare it with another tank of known salinity and mark the scale with a waterproof marker or nail varnish.

    This, of course, is not foolproof, and if you are mixing your own salt water, then you must get a refractometer.
     
  10. CW

    CW Thread Starter

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    I added the chiller last night.
    I had the heat problem about 4days ago.
    The green finger leather looks mutch beter now.
    Dont know if it might be that i droped the salinity?

    What do you think?

    Cw out
     
  11. Darryl

    Darryl

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    Both temp and salinity,among others, play a huge part.

    Glad to hear that the leather is looking better. With the temp under controll, you need to chech on that salinity now. Can your local pet shop test your water?
     
  12. CW

    CW Thread Starter

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    Ja thats a fact.

    Ill have to try and see if i cant get someone to test the salinity with a refractometer yes.

    That will be the best.
    But im gona get myself one i tell you.

    Thanx for the advice man.
    I hope the water change will also have a gib effect on everything.

    Cw out
     
  13. Monde

    Monde

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    My Hydrometer and refractometer are always arguing with each other. I believe the Refractometer.
     
  14. CW

    CW Thread Starter

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    HeHe

    Then ill just have to get myself a refractometer.

    Cw out:thumbup:
     
  15. maxisoft

    maxisoft

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    Hi CW, I was having some issues with my hydrometer too, but then
    I had a fellow reefer come around with his recently calibrated refractometer. We tested with Refractometer and Hydrometer.
    Conclusion: See where your hydrometer reads as opposed to the refractometer and counteract the incorrect calibration... eg if your hydrometer reads 1.025 and the refractometer 1.023 then you know its out by .002 and you use that as your reading...
    minus the error...

    However, this would be a temporary measure untill you get yourself a refractometer...
     
  16. rakabos

    rakabos

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    If ure planning on keeping marines long term which i assume you are i couldn't more strongly recommend a refractometer. Also grabbed one off Ebay for R400 or so and worth every single cent. You dont wanna lose live stock with a rubbish hydrometer and yes they are ALL rubbish even the Red Sea one my dog has as a toy now ;)
     
  17. CW

    CW Thread Starter

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    hehe

    Jip im gona get myself one ASAP.

    Cw out:thumbup:
     
  18. Manic

    Manic Moderator

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    I use the tropic marin hydrometer. It is the most accurate tool to measure salinity although it does cost a lot.
     
  19. gaboon

    gaboon

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    the tropic marin hydrometer is the balls. Keep your hydrometer though and check it against a calibrated refractometer. Will safe you some cash. Mine cost me R60.;)
     
  20. CW

    CW Thread Starter

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    Ja the one i got was R55 from Wild On Pets in Edenvale.

    Thanx for the advice.:thumbup:
     
  21. Manic

    Manic Moderator

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    The tropic marin hydrometer is around R700 now just for interests sake.
     
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