My 120 Build so far. Took a little playing with filtration to get what I wanted. Tons of flow, more than I need. I'll dial it down a bit and the fluidized bed is moving well I think.
Need light and start stocking with decor and plants.
It might just be how it looks on the video, but I agree with you, you need a little bit more media in there. Open space in fluidized media makes it less efficient.