Yes, my cyps get fertilizer this time, in low cc (70-80 ppm), regulary ( every week). Sun is not too much, I think, cyps get direct sunlight only after 4 pm.
Of course in summer I will have to make some shadier conditions for them. What you see is maybe because of light conditions, real colour is full green. I will keep you posted, so you will see more pics with real colour.