Tank topography

Hi just a question about your sand. Right now i have nothing in the tank i'm just restating my tank, in cycle, and with new pumps Tunzes. The flow of water is creating ridges and little mounts that i find kind of interesting to look at and actually tells me where the water flow is going and where a possible coral could go. Should change my pump positions to avoid these, and flatten the sand again, or is it ok to leave them?
Thanks for your time.

Tank 150 G 6' long X 24"X 21"
4 tunze powerheads 2 at each end.