Particularily the LPS and SPS polyps turn to a paler color after a week or so after introduction, and remain that way. My green slimer was a shaggy deep-green stick when I introduced, but the polyps are a lighter green now. The candy cane I introduced 8 days ago was red, now more of a pink. Corals are not browning out, just fading in color. Actinics are on from 10am-9pm, whites from 11am-7:30pm. 48" 6 bulb T5. Bulbs are original stock, 6 months old. I feed Coral Frenzy once weekly (sometimes I miss a week), and feed the fish a mix of frozen and nori daily. I've been dosing vodka for about 3 months now, and have established a daily dose of 3ml (1.5 in am and pm each). 10% WC bi-weekly. PO4 and NO3: undetectable Alk: 10 Calc: 440 Mag: 1500 (lowering) Temp: 78-81 PH: 8.3 SG: 1.026 Any thoughts? I might try feeding the corals more often... should I target feed instead of just dumping in? Should I increase/decrease lights? What causes fading (as opposed to browning, which is too little light)?