In a 29 gal tank lit by a Current Sunpod 14k HQI MH fixture I recently added a piece of purple encrusting Montipora and a leather of some sort (sinularia??) that was snow white at the lfs. After 2 weeks in my tank the Monti is a med. to dark green color and the leather has neon green coloring in the tips where the polyps are. Both corals are healthy and have good extension but have changed color. Is it poss. that the 14k is to much blue light and if so, would changing to a 10k be ok considering that the fixture uses 6 blue leds for an actinic source. Thanks to all!