I read an article that talked about creating a circular pattern of flow (for larger tanks) around the reef structure with one or two pumps. It said that this can create a good flow pattern and higher velocity in the upper region while the lower portion of the reef recieves less flow which would good for lower light needing corals. It also mentioned that you can reverse the flow for a period of time (12 hours perhaps) to allow a more complete coverage of the reef. Anyone doing something like this? It kinda implied that the quicker on/off wavemakers were not as effective (for larger tanks) because of the time needed to genertate a descent momentum of flow.
Greg
Greg