Hi Maiden,
There are various opinions amongst seasoned Heli growers as to whether totally red Helis are a good thing. I tend to try to reduce the lighting, just a bit, to have some
chlorophyll-based green pigmentation present. The ease to which a particular Heli species turns red is, imho, strongly dependent on specific species genetic tendencies, as well. My H. ciliata, and H. folliculata get completely red very easily with ample lighting, whereas, H. minor, really has to be 'driven' by strong light to get completely red. The frequency of the light also plays a part. My 5000 kelvin bulbs produce more red in my Helis, than the 6500 kelvin bulbs that I used before, at the same wattage.
Hope this helps!