Thanks for the info Sophie. I got back after going out of town for
3 days and I swear it grew almost a foot since I left(pictures on webpage).
Hopefully it will calm down a little soon or I may run out of room for fish


Thanks!

Peter

the very fine-leaved one is hornwort, the similar one with broader/shorter
leaves is probably anacharis.
hornwort grows like a weed on steroids, or it does for me.

--
sophie