I vacuum my sand on each water change to get as much debris that falls down as I can but I really think it's my noob rock work that causes so much Ditris to accumulate and cause a giant algae bloom. Here's a pic of my tank in its prime but it also shows u novice rock work and why I really want to change my rocks. It's 3 boulders on the bottom that supports 1 large plate piece from 1 end of my tank to other and a ton of small fist size pieces with corals on top. So all the garbage gets trap under the small pieces and sits on top of the large plate. Flow can't get to it.
This layout also does not allow my sps to grow and I can't fit much. What I want to do now is build 2 or 3 towers with a bridge. That way there's ton of space for things to grow and fishes to swim.