I have the same problem with my amazon sword. My light is 15 watt in 20
gallon about same as yours. I have tried the root tables, jobes sticks and
seachem flourish fert and they dont seem to help the swords much. I also
have DIY CO2 running and do water change every 10 days.
Other plants ,java fern and anubius are doing great. My next option is to
increase the lighting to 30 watt. Hopefully this is what the sword needs. I
also had rotala indica in tank and it has slowly died.

Please post me if you can get your sword growing again.




"rnj" wrote in message
...
Yellowing can also be a sign of low Potassium and iron levels. Java fern
and
Swords have leaves that die after a certain period of time too. The
anubias
leaves last much longer. Some of what you are seeing could be natural die
back. If you are getting new growth from the middle of the sword plant
that
isn't yellow, then it is most likely that you have old leaves coming to
the
end of their life span.
This can be frustrating for newbies, they buy a nice plant and it looks
good in their tank for a month or two but it doesn't get enough light or
nutrients to grow new leaves to replace the old, and the plant slowly
dies.
15 watts of light is on the low side for swords to grow well, so it may be
doomed to a slow death or will shrink in size until it is hardly
noticeable.
The java fern and the anubias are low light plants that can almost be
grown
in the dark.

"Iman Mostafavi" wrote in message
. ..
I have an amazon sword, anubias, java fern and african fern in a 26
gallon
tank with a 15watt fluorescent light.

Everything other than the anubias is getting yellow leaves (old ones)
and
holes are appearing in the leaves as well. I know I don't have that
much
light but i get a lot of non direct light through the windows during the
day. I'm thinking fish food might not be enough fertilizer for the
plants.

What's recommended to fertilize aquatic plants? Is there a liquid I can
add
to the water, or something i can stick in the gravel near the roots?

Any suggestions would be appreciated.

-Iman