I don't know who told you that the individual Kessils are not fill spectrum, but they were wrong. All of the Kessils are full spectrum and not only that but they maintain full spectrum regardless of what settings you use visually. That's why they are so great.It's pretty simple why you are not having the success with the old style kessils. They aren't a full spectrum led and as soon as you add spectrum back in with the t5 lights the corals grow again. The poster above is having great success with his new full spectrum kessil and I know that in our shop once we moved all reefs over to full spectrum led we quit experiencing any problems. We don't have any tanks in our entire store lit with anything but leds anymore and couldn't be happier.
The big difference with the AP700 is that it's spread and penetration is much better due to the reflectors.
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