I am currently running 150w sunpod with 14K HQI bulb that came with the light. I am running into some problems with mushrooms and pulsating xenias. Before running MH, I had PC and my mushrooms were big and my xenias were pulsating like mad. After the switch to MH 5 months ago, my xenias don't pulsate and they are shrinking along with my mushrooms. My mushrooms are losing color. I have my MH like almost a foot above water level. Should I switch to 20K bulb?? Will a 20K bulb have less penetrating intensity vs. 14K? (Less prone to bleaching out corals) If so, what brand of 20K HQI bulb do you recommend?? Thx in advance.