Hi..

I've tried unsucessfully to grow Hornswort for a few
years, and finally gave up. Several months ago I moved,
and in my tank I had a few 1 inch scraps of old hornswort,
barely alive. Today, it is an infestation that I have to
thin periodically. Is Hornswort sensitive to different
water types? I have very soft water right now, where
before it was fairly hard.

Mine in a summer pond in the dark shade of some trees has
been growing heavily this year but in another (sunny)
summer pond it has been competed in a few weeks by water
lettuce..

In a small tank at the souterrain window baby water lettuce
and duckweed are fighting for the gold medal in
displacement.. :-)

In my tanks and ponds Elodea were always able to compete
hornwort..

But neither duckweed nor water lettuce seem to be able to
kill Elodea definitely. Allthough they made it stagnate for
a while..

--
cu
Marco