Gozer_1
Very true about coraline. My coraline algae does best in the shady areas of the tank. I purchased a nice rock with good coraline on it only to find it bleaching out after a couple weeks. When I moved the rock lower to a more shaded place the coraline snapped right back. The rock was also home to a nice size colony of feather dusters. They have thrived since being moved to the shade. As for cycling in the dark, I don't think it would matter as long as it's just some rocks and sand. I believe some light would be beneficial though. Your coraline is not really gonna take off until after you're cycled and stable. I've actually been looking into coraline algae lately. Mine has never been really strong. I started using Purple Up and had little results until I resupplied my stock in SeaChem Reef Trace. The combination of the two seems to be really doing the trick. The fact is, you're gonna have issues when you start out. Seems everyone goes through the brown algae stage then the green, then macro until finally everything reaches a balance. It could take months for a tank to really come into it's prime. I'm just glad I haven't had to deal with aiptasia anemones. (Knock on wood)