1389 sounds good
Make sure that the flow circulates around ur corners and gets to dead corners.
There will always be some kind of settled down stuff somewhere, so just make sure that during PWCs you siphon some of that out.
Some ppl change their powerhead positions weekly it monthly or "storm" the tank once in a while. Try what works vest for you
Also, between MN and 8am most of us are sleeping
sorry it took a while