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H.Difformis deficiency symtoms[ was Re: Nutrient deficiency]

> Date: Sun, 11 Jun 2000 12:02:49 -0600 (MDT)
> From: "Roger S. Miller" <rgrmill at rt66_com>
> Subject: Re: Nutrient deficiency

> General yellowish color is probably caused by a shortage of nitrogen. You
> have very few fish in this tank so it looks to me like your plants' yellow
> color is probably caused by nitrogen deficiency.  You can also check the
> condition of older leaves.  It's common (not necessarily universal) with
> nitrogen deficiency for older leaves to die back from the tips. An iron
> deficiency creates interveinal chlorosis (green veins, light colored areas
> between veins) appearing first on young leaves and sulfur deficiency is
> pretty much unheard of.  A calcium deficiency would cause deformed growth,
> but you don't seem to have deformed growth.

What about cracks appearing on newer/older leaves? Newer leaves are pale
green. And the older leaves cupped. I am more than confident that it's
not Calcium deficiency as CaCO3 is added after water change. Tank is
highly lited with CO2 injection and low fish load.

Could this be Nitrogen deficiency?

Zon Hisham