Hey thanks! your more than welcome to come visit when these crazy times passes by...
For me, I don't worry about turnover rate. I just make sure I have enough flow that no detritus will settle on coral flesh especially on the bases of the acros. Easier to do when they are frags. haha I have 4 mp40s running a mix of reef crest and nutrient transport at the moment. They are running only about 30-40% but as acros grow I will probably need to tune up and maybe reposition or add more to the back wall. For now, 2 on each side seem to work for me.
On my low flow tank. Everyday, I have to blow off detritus on a few of my corals when I feed the tank. I can't really tune up the flow or my mushrooms will detach and fly every where. lol