BIG QUESTION:
I don't understand what's going on, biotopica - what are you doing ? It appears here that you are an experienced discus raiser (or importer), with several tanks, which you say is a farm.
Yet I have just seen new posts by you on simplydiscus.com, which appear to represent that you are a newbie discus keeper in Madrid, Spain, looking for advice on getting started with a planted discus tank.
What gives ? Am I missing something big ?