http://www.myfishbox.com/members/jmarella/index.html *lol* That's really... humm.. well .. I'm speechless! =D Somehting else: What about UV-bulbs to get redder color in red plants? Anthocyanin is supposed to be like a sunscreen protection against UV - wouldn't it be easier to use a UV-bulb than trying to induce nitrogen deficiency? // Daniel Larsson, www.akvarie.net/defdac/