I also just started up saltwater. The sand and rock wont fight and will help you cycle as far as i know. you need 1-1.5 lbs of rock per gallon. Also depending on your tank size, and filter gph, i dont see any circulation pump or power head.
Not if they will fight but like will they not function with each oth... Never mind no I wasn't asking if they actually fought no and I will be getting a power head this weekend for sure and a LFS water test there's already algae in my rocks in the matter of 4 days.