Update since this morning. Woke up and started getting everything ready to go into the tank for the hardscape layout. OMG Saf T Sorb is DIRTY. I used some small gravel for a base to boost the hills, although i do have plastic support pieces that will be cut to brace as well (didnt want a 5" tall area of miracle gro). I will be picking up sand for the center "river" on tuesday, or later today...dunno yet. Will be setting the sump up soon, gotta get the rest of the gravel out of it. Plumbed the overflow for the sump though, gotta get a filter basket stack thingy to drain it into and the intake will be done. Need a return pump too, gonna grab one from harbor freight for $35.