po4 levels

Discussion in 'Water Chemistry' started by billy boy, 2 Oct 2008.

  1. billy boy

    billy boy Member

    Messages:
    276
    Location:
    wick. scotland
    After haveing some bother with green spot alage everything pointed to my po4 levels, so off i went and got a kit and my levels turned out to be 2.5mg, the leaflet that came with the kit says its down to lack of maintenance or overfeeding which i know its neither of these as i clean and change 50% of my water weekly!
    so my question is why are my levels to high? could it be my ferts which is a diy tropica which consists of ingredients below

    48g Potassium Nitrate
    2.2g Potassium Phosphate (monobasic)
    17g Magnesium Sulphate Heptahydrate (Epsom Salts)
    5g Aqua Essentials Trace Elements Mix
    0.5g E300 Ascorbic Acid
    0.2g E202 Potassium Sorbate
    500ml distilled water

    any help would be much appreciated, thanks billy boy
     
  2. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

    Messages:
    8,952
    Location:
    Chicago, USA
    Hi,
    Do you mean your test kit reads 2.5 ppm? There is no way you test kit can return a milligram value. GSA occurs due to low PO4 so my recommendation would be to throw your test kit away and add more PO4, either to your formula or add it separately.

    Cheers
     
  3. JamesC

    JamesC Member

    Messages:
    1,276
    Location:
    Bexley, Kent
    Or could be low CO2 as well.

    James
     
  4. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

    Messages:
    8,952
    Location:
    Chicago, USA
    Yep, true enough. Would be interesting to know whether there are any other CO2 related issues in the tank such as hair/staghorn/BBA or slow growth?

    Cheers,
     
  5. billy boy

    billy boy Member

    Messages:
    276
    Location:
    wick. scotland
    My drop checker is showing a deep green, i have a small amount of bba but it seems to be just on the older leaves of my narrow leaf, sorry the nutrafin test does read ppm. doh :oops:
     
  6. SuperColey1

    SuperColey1 Member

    Messages:
    2,677
    Location:
    Lincoln UK
    I wouldn't say 2.5ppm is too high anyway. I think overfeeding from the furry narrow leaf you describe. or overfeeding in one are of the tank.

    AC
     
  7. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

    Messages:
    8,952
    Location:
    Chicago, USA
    Well, see if you can increase the CO2 to get the drop checker more lime green. We assume you are using 4dkh water in the checker, correct?

    Cheers,
     
  8. billy boy

    billy boy Member

    Messages:
    276
    Location:
    wick. scotland

    Yes i am useing 4dkh, i will increase the co2 and take it from there, thanks for your help :)
     

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