What a difference it makes to have a system that allows for 3D growth. Here are pics from today:
As you can see, the bottom 3" is now fully submerged. The thing that I'm wondering about at this point is how much water turnover is happening in that middle area. I'll have to keep an eye on that and look closely at the screen before cleaning. I should have cleaned it today, but I'm going to shift my cleaning schedule to the weekend so I"m not interfering with my work or their office hours, so Saturday AM I'll be in there to clean & take pics.