"Graham Ramsay" schreef in bericht
...
I wonder if some one would be kind enough to
look at this plant:

www.ibrox.freeserve.co.uk/images/hygro.gif

It's a fast growing plant (I think a Hygro of sorts)
and looks to have some kind of deficiency. Searching
the web I think it may be Potassium. Can anybody
confirm?

Hygrophila Corymbosa ?

The holes in the leaves could be K defiency.
The yellow spots could be Fe defiency.