Power heads and sand problem!!!!

Hello. Maybe I'm wrong I have a 55gal tank with live rock and live sand. I have 2 power heads 1 on each side wall of my tank. I feel as though I have good flow. But my problem is, it's seems to me the power heads are always blown sand into the air of the tank which drives me cray plus it blown sand on to my rocks as well drives me nuts!!!!! What should I do or how do I fix it might I add no coral and at this time no plans to do it until I master the fish only part