No- it is just fed the Flourish line of products including Excel- and the new Tiger Lotus are doing fine.Do you CO2 the tank?
The fish are much braver now. They sail back and forth across the tank like a procession of sailing ships, and will already follow my fingers around. I just love them. I already spent a fair amount of time watching fish but now I'm looking for excuses to hit the sofa next to the discus tank and just lose an hour following them. The tank is very serene- which was after all my goal. They sail in and out of the valliseneria from light to shadow- it is just awesome to watch. I even saw a couple of the braver ones inside the huge clay pot poking around.
Did I say how much I love them?