This site is supported by the advertisements on it, please disable your AdBlocker so we can continue to provide you with the quality content you expect.
  1. We are after as many aquarium plant images that we can get, doing so will assist us in completing the aquarium plant database.

    https://barrreport.com/threads/aquatic-plant-images-wanted.14374/
    Dismiss Notice

Iron test kits

Discussion in 'Aquatic Plant Fertilization' started by Petex, Feb 28, 2014.

  1. Petex

    Petex Member

    Joined:
    Jan 1, 2011
    Messages:
    256
    Likes Received:
    0
    Local Time:
    4:05 AM
    hi,
    are there any aquatic Iron test kits out there which measure also chelated Iron like DTPA and EDDHA?
    (my test kit doesn´t)
     
  2. rjordan393

    rjordan393 Guru Class Expert

    Joined:
    Mar 5, 2013
    Messages:
    197
    Likes Received:
    0
    Local Time:
    4:05 AM
    The Nutrafin Iron test kit will test for chelated iron.
     
  3. Petex

    Petex Member

    Joined:
    Jan 1, 2011
    Messages:
    256
    Likes Received:
    0
    Local Time:
    4:05 AM
    How sure are you?
    Have you tried to meassure Fe-DTPA/EDDHA with the Nutrafin test?

    I ask this, because my iron test kit was also advertised as an iron test kit "that can measure chelated iron".
    Fact ist, it still can measure chelated Fe-EDTA (and for some parts Fe-HEDDTA) - but it failures at FE-DTPA & FE-EDDHA.
    (and I guess many other test kits will also not detect Fe-EDDHA, Fe-DTPA, Fe-EDDCHA )
     
  4. rjordan393

    rjordan393 Guru Class Expert

    Joined:
    Mar 5, 2013
    Messages:
    197
    Likes Received:
    0
    Local Time:
    4:05 AM
    The nutrafin test kit only says it will test for chelated iron and non-chelated. You will need to contact the manufacturer about other forms of iron. I was using edta iron at the time I purchased the kit. Sometimes I use ferrous gluconate but I need to test for it in about 10 minutes after dosing as this will not read on any test kit after about 1/2 hour.
    Do you test soon after dosing?
     
    #4 rjordan393, Mar 3, 2014
    Last edited by a moderator: Mar 3, 2014
  5. Petex

    Petex Member

    Joined:
    Jan 1, 2011
    Messages:
    256
    Likes Received:
    0
    Local Time:
    4:05 AM
    Yes, gluconate breaks down very quickly in a tank.
    EDTA will last some hours or a little bit longer depending on PH.
    DTPA ist more stable and I was told EDDHA "should" last some days.

    I am using DTPA/EDDHA in my own fertiliser mix, so I am certainly interested to know how long those iron chelates now really last in the water coloumn and if there is perhaps any accumulation.
     
  6. rjordan393

    rjordan393 Guru Class Expert

    Joined:
    Mar 5, 2013
    Messages:
    197
    Likes Received:
    0
    Local Time:
    4:05 AM
    I will see if I can find out on another forum I subscribe to; if no one here has an answer. In the meantime, check out this article on "iron Transformation" which is related to your question. Http://www.skepticalaquarist.com/ferrous-ferric
     
  7. Petex

    Petex Member

    Joined:
    Jan 1, 2011
    Messages:
    256
    Likes Received:
    0
    Local Time:
    4:05 AM
    Thank you very much if you would ask on a place where ppl. know such things.

    The Test kit i have uses a mix off acetic acid + sodium hydroxide to change the PH from the test solution, so that the iron gets unbound from the chelate - but it hasn´t worked out. Like you can see on this chart, Fe-EDDHA is pretty PH stable and so I guess many test kits may have some serious problems with such strong chelates: http://www.smart-fertilizer.com/loadedFiles/iron%20chelate.png
     
  8. rjordan393

    rjordan393 Guru Class Expert

    Joined:
    Mar 5, 2013
    Messages:
    197
    Likes Received:
    0
    Local Time:
    4:05 AM
    Here is a reply from one of the forum moderators:
    I would suggest you contact the manufacturer in Canada for further information. Sorry, I can not help any further. Nutrafin test kits are manufactured by the "Hagen" company.

    - - - Updated - - -

    Here is a reply from one of the forum moderators:
    I would suggest you contact the manufacturer in Canada for further information. Sorry, I can not help any further. Nutrafin test kits are manufactured by the "Hagen" company.
     
  9. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,692
    Likes Received:
    721
    Local Time:
    4:05 AM
    Yes, you will need something very strong to get the EDDHA out, but few hobbyists use it, it's really super red and only a tiny bit will make your water turn red in color.

    DTPA, you should be able to address that with a stronger acid, say HCL or H2SO4. I think Paul K. had some data on the DTPA in solution.

    http://fins.actwin.com/aquatic-plants/month.9703/msg00232.html
     
  10. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,692
    Likes Received:
    721
    Local Time:
    4:05 AM
    Yes, you will need something very strong to get the EDDHA out, but few hobbyists use it, it's really super red and only a tiny bit will make your water turn red in color.

    DTPA, you should be able to address that with a stronger acid, say HCL or H2SO4. I think Paul K. had some data on the DTPA in solution.

    http://fins.actwin.com/aquatic-plants/month.9703/msg00232.html
     
  11. Petex

    Petex Member

    Joined:
    Jan 1, 2011
    Messages:
    256
    Likes Received:
    0
    Local Time:
    4:05 AM
    @robert
    thank you for asking.;)

    @Tom
    The Fe-EDDHa part isn´t huge, because too much will discolour the water pinkish.
    I still use around 5% - 10% EDDHA or so, the Fe-DTPA part is higher around 30%. The other 70% are Fe-EDTA / HEdDTa and I am also playing a little bit around with ferrous gluconate.
    For Fe-DTPA it seems I found an austrian test kit which can meassure it.
    So still the EDDHA thing is left.
     
    #11 Petex, Mar 4, 2014
    Last edited by a moderator: Mar 4, 2014
  12. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,692
    Likes Received:
    721
    Local Time:
    4:05 AM
    I'd just leave the EDDHA out entirely, use the Gluconate instead.
    You plan on doing more than once a week etc?
    Do not have an insanely high KH?

    Then do not bother with it.
     
  13. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,692
    Likes Received:
    721
    Local Time:
    4:05 AM
    I'd just leave the EDDHA out entirely, use the Gluconate instead.
    You plan on doing more than once a week etc?
    Do not have an insanely high KH?

    Then do not bother with it.
     
  14. Petex

    Petex Member

    Joined:
    Jan 1, 2011
    Messages:
    256
    Likes Received:
    0
    Local Time:
    4:05 AM
    The KH isn´t high, but I need to pump lots of ferrous gluconate iron in my highlight tanks, let say 0,3-0,5ppm/day and doing so will be expensive in the long run.
    50-100g Ferrous gluconate cost in Germany around $60-80 and this seems not to be the best price deal if 100g Fe-EDDHA, Fe-DTPA and similar stuff, cost less then $10.
     
  15. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,692
    Likes Received:
    721
    Local Time:
    4:05 AM

    Yikes, that's a lot o Euros.
    You might try Fe gluconate from bulk vitamin suppliers, they tend to be much cheaper.

    http://purebulk.com/ferrous-gluconate-powder.html#.UxdPkT-wLYg

    Buy 3 kilos and you will have enough for a few years.
     
  16. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,692
    Likes Received:
    721
    Local Time:
    4:05 AM

    Yikes, that's a lot o Euros.
    You might try Fe gluconate from bulk vitamin suppliers, they tend to be much cheaper.

    http://purebulk.com/ferrous-gluconate-powder.html#.UxdPkT-wLYg

    Buy 3 kilos and you will have enough for a few years.
     
  17. Petex

    Petex Member

    Joined:
    Jan 1, 2011
    Messages:
    256
    Likes Received:
    0
    Local Time:
    4:05 AM
    wow, thats pretty cheap.:eek::eek::eek:
    I still guess they wont ship outside USA? Even if they would, I fear the UPS shipping will be very expensive and in Germany you need to pay high taxes at customs offices for any imported articles (outside EU).
    Only if buying inside EU, there are no taxes. :p
     
Loading...

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice