Re: My tank can't get enough iron!llip Barak's

[Ivo Busko <busko at stsci_edu>]

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/

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