"Justin" wrote in message
...
Hi all,

I was wondering if I could ask some advise of you all?

I appear to have developed a deficiency of some sort in my tank... I've
been to theKrib and had a look at the chart and it could be one of a
couple
of things... Boron, Ca, Magnesium, Manganese, Copper, Zinc or
Molybdenum...
I put 5 drops of Dupla Plant 24 in my tank a day, which is enough for
250litres and my tank is 200 litres...


5 drops a day! This may be fine for a 250l tank but it really depends on how
much light you have under the hood. Perhaps you should be adding about 5ml
2-3 times a week.


My sword plant's new growth is light
green, has holes, dead spots and the leaf lookes all distorted (kind of
like
melted plastic) Also, the old leaves of the Aponegeton are going
brownish/red and develping holes...

Starving plants,,,,up all your macro nutrients drastically.


I would have first thought Potassium - for the holes, but I add 1.5tps of
K2SO4 twice a week... I add 2x500mg tabs of Ca, and I add enough
magnesium
to bring my level up to 5ppm... Can anyone please point me in the right
direction?? My Fe level has dropped dramatically since I added my PH
controller... It was at 0.5, now I am having trouble keeping it above
0.01... Could it be possible that b/c now I have brought my CO2 up to
19ppm
(previously I think it was 9ppm) that the plants are using all the
fertilizers and I am developing several deficincies at once?

Yes. Add more ferts. Try to bring the co2 up even higher....30ppm.


Does anyone else find that there is ALWAYS a nutrient deficiency of some
sort in their tank? Do you think that it would be worth making some PMDD
that way I can tweak it to my spec's? I.e. more Ca and Mg than the Dupla
drops?

PMDD is a good idea, every tank's needs are different. If you follow Tom
Barr's recipe its virtually foolproof. Throw all the nutrients your plants
will ever need and then do a LARGE water change over the weekend to reset
the tank, best damn technique for growing aquatic plants ever
--
Kind Regards
Cameron