I have a solitary hygro stricta on a corner of my 17-gallon tank.
I am sure that I have all the requirements for the more demanding
high light plants since their top are turning red and growing thicker
whorls.
But I seem to have problems with the Hygro Stricta and Corymbosa
"Compact" species.

After 2 weeks or so, I started to see sections
of Stricta's leaves missing, like as if there are plant-eating snails
in the tank (which there are not!). Sometimes the whole tip of
the plant just broke off and float to the surface. They are also
being attacked by spot algae. I notice that the Stricta
and Corymbosa leaves are turning light green. Each day passing,
it seems that it will grow almost yellowish.

Now, all this is a bit strange since I dose the tank 3 times
a week with Flourish Potassium, Flourish Trace Elements and
Dennerle Iron tablets. Lighting is at 4.8 watt/gallon. I know
local water is a bit soft (2 GH) so I sometimes add CaCO3
vitamins...

Any advice or info will be appreciated.

Practically EVERYBODY in my tank likes eating the corymbosa! The ottos leave
small holes in it, the pl*cos scrape it, and the buenos aries and red-eye
tetras tear the edges off. Fortunately, it grows so fast that it still
manages to look good.

Are you adding CO2? You've got enough light (!) and you're adding plenty
(again, !) of nutrients, so CO2 deficiency would be my first guess.

kush

alex crouvier wrote in message
...
I have a solitary hygro stricta on a corner of my 17-gallon tank.
I am sure that I have all the requirements for the more demanding
high light plants since their top are turning red and growing thicker
whorls.
But I seem to have problems with the Hygro Stricta and Corymbosa
"Compact" species.

After 2 weeks or so, I started to see sections
of Stricta's leaves missing, like as if there are plant-eating snails
in the tank (which there are not!). Sometimes the whole tip of
the plant just broke off and float to the surface. They are also
being attacked by spot algae. I notice that the Stricta
and Corymbosa leaves are turning light green. Each day passing,
it seems that it will grow almost yellowish.

Now, all this is a bit strange since I dose the tank 3 times
a week with Flourish Potassium, Flourish Trace Elements and
Dennerle Iron tablets. Lighting is at 4.8 watt/gallon. I know
local water is a bit soft (2 GH) so I sometimes add CaCO3
vitamins...

Any advice or info will be appreciated.