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Re: My tank can't get enough iron!llip Barak's
Aaron Ivers <Ivers.Aaron at spartan_ab.ca> wrote:
<snip>
>The "COMMON SYMPTOMS OF NUTRIENT DEFICIENCY IN AQUATIC PLANTS" chart located
>on the krib is a great idea as well, but it seems to be so vague that it's
>practically useless. Spice it up with some pictures of some hygro-poly
>showing the deficiencies described in the chart and then that's a useful
>tool. Heck I'd be happy to just know the difference between Fe, N, and P
>deficiencies (I think I've always had one, even though my test kits say I
>don't)!
>
>Regards,
>Aaron
The pictures in Phillip Barak's article at UW Madison:
http://www.soils.wisc.edu/~barak/soilscience326/essentl.htm
could be used as a start, despite being pictures of terrestrial plants.
I also do not use anymore any test kits except NO3 (very occasionaly), kH,
gH and pH. I found that, under my particular tank's conditions, frogbit,
hygro and pennywort are good indicator plants. Hygro is sensitive to K
deficiency (shows holes in old leaves), pennywort and frogbit to iron
(dark green veins in leaves) and N (overall loss of lush green). I've
also seen phosporous deficiencies in my outdoor pond in water hyacinth
(exaggerated purplish growth) and K deficiencies in frogbit (holes in
leaves).
- Ivo Busko
Baltimore, MD
"Buy a fish, Save a tree !"
Project Piaba: http://www.angelfire.com/pq/piaba/