I have a new 75 gallon tank that I am going to start on. My goal in to have some corals that require low light to med. light. and add some fish also. while my cycle runs, can I go ahead and put my LR in or do I need to wait untill the cycle ends? and also could some one tell me what kind of lights I would need for a 75gallon tank to keep low light to med. light corals? I can't get the BEST lights right now, because I am just starting out. I was looking on this web site, and seen quite a few corals it say can live in low to med. light. some that I was intrested in picking from was the christmas tree coral, green star polyp, mushroom coral "blue stripe", star polyps, soos green eye, leather cabbage, mushroom coral pimple & green hairy. Any suggestions on lights for these and which ones to buy and when to buy them would be great! I also want to know if I could use a real good HOB filter and later on upgrade to a sump, pump, filter.....ect.... is this ok?