Some of the plants look like it has calcium deficiency.
"Bartek Lipczyński" wrote in message
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Użytkownik "kush" napisał w wiadomości
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Do you have another shot of it, maybe from the side rather than
top-down?
I
think it's Heteranthera zosteirfolia, aka mud plantain, but it's hard to
be
sure without seeing the nodes.
Please look on pictures under paragraph 7 www.infofarm.com.pl/~bartek
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Regards
Bartek Lipczynski
www.infofarm.com.pl/~bartek