Thanks!
The water is hardly cloudy at all today, but I think I used too much sand.
Even where I have planned for erosion and where the filter return is causing the substrate to move, there's too much bulk. I think once a good amount of settling has occured, I'll have too much sand in the open area. I may remove a fair amount today... not sure yet. Might let it sit another day before deciding.
The rocks are looking sweet though, and I'm pretty happy to see the amount of flow I'm getting, from just one filter. Even with both the return and sewer on the floor, there is a lot of surface movement. I'm really itching to see how it flows with the 2213 as well.