Replacement tubes for API KIT

Discussion in 'Test Kits' started by rcordova233, Jul 4, 2016.

  1. rcordova233Well Known MemberMember

  2. Aquaphobia

    AquaphobiaFishlore LegendMember

    I think they would, they have the same diameter as the API tubes (I just checked) so the distance light has to travel through the solution would be the same and the colour should match the chart. Only thing I wouldn't be sure of is whether the plastic affects the passage of the light differently from the glass. And you'd have to ensure that you measured out 5mL of course;)

    I agree, the price of the API tubes is ridiculous!
     
  3. OP
    OP
    r

    rcordova233Well Known MemberMember

    DIAMETER. THAT'S WHAT IT WAS!!! Thanks I've been scratching my head all day trying to figure out what it was the couldn't be different. Hopefully somebody else can answer if plastic affects light. I'll try to find some glass ones in the meantime.
     




  4. Aquaphobia

    AquaphobiaFishlore LegendMember

    I was just on ebay and found several. Nice ones, borosilicate, laboratory-grade glass and all that;)
     
  5. OP
    OP
    r

    rcordova233Well Known MemberMember

    Oh shoot. Could the test liquids stain the plastic? I guess this wouldn't be good for testing if it does.
     




  6. OP
    OP
    r

    rcordova233Well Known MemberMember

    Would you happen to have a link?
     
  7. TexasDomer

    TexasDomerFishlore LegendMember

  8. OP
    OP
    r

    rcordova233Well Known MemberMember

  9. Aquaphobia

    AquaphobiaFishlore LegendMember

    Those are 20mm in diameter.
     
  10. OP
    OP
    r

    rcordova233Well Known MemberMember

    Is that bad?
     
  11. Aquaphobia

    AquaphobiaFishlore LegendMember

    Well, the "thickness" of the liquid that the light has to pass through may affect the colour that you see. It's 50% wider which is a significant difference.
     
  12. OP
    OP
    r

    rcordova233Well Known MemberMember

    Oohhh. Alright back to looking then.
     
  13. OP
    OP
    r

    rcordova233Well Known MemberMember

    What diameter would work?
     
  14. Aquaphobia

    AquaphobiaFishlore LegendMember

    The originals are 12mm. Something like these should do:  
     
  15. TexasDomer

    TexasDomerFishlore LegendMember

    I think you're overthinking this.

    I don't think it'll change the color too much and I would feel comfortable using those.

    You can look at the liquid from the top (looking straight down the tube) and the color should be the same or too similar for you to see a difference as when you use the API tubes.
     
  16. OP
    OP
    r

    rcordova233Well Known MemberMember

    Hmmm....... just put the order in........ kinda feel like I played myself. Whatever though its 10 tubes for 5 bucks. Just have to wait a week.
     
  17. Aquaphobia

    AquaphobiaFishlore LegendMember

    Blame it on my OCD;)
     




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