Sorry, I read a couple different languages but not that one.
I'll try to get a Seachem Equilibrium from USA too, once again will adding only KNO3 and KH2PO4 + http://www.pfertz.com/rootferts.html have positive impact on the plants or that will mean a problem (algae)?
I find algae growth is dependent on many conditions: light, nutrient levels, circulation, overall cleanliness and maintenance. I think the answer to your question is it depends upon how much of those fertilizers that you add.
The website appears to be 'down' at the moment, I will try to read this thread later.