Hi there, i bought these two heckels about one month ago. I must say taking a good shot of heckel is harder than any other discus strain. They change colour or fade away the 5th bar in a split second. To try to capture a good photo with all the blue colour showing, 5th bar prominently showing and preferably showing all 1st, 5th and last bar at the same time for a photo shoot is beyond my photo skill. They are about 12 cm and so far so good.