Thanks! I'm using crushed coral but I wish I had regular sand (nothing wrong with the crushed coral, I just like the look of the sand better). Considering how I might change my substrate but nervous about screwing up the tank. I have the inTank media basket in the back middle chamber with filter floss on top, purigen in the middle and the chemi pure elite on the bottom. Next to that I have some live rock rubble and a small ball of chaeto on top of that with a nano fuge light that goes on at night. I took out the sponge between the middle chamber and chamber 3. Then I swapped out the return for an MJ-900 which is super quiet and doing great. I'm pretty close to Gainesville (just down 234 off Hoadly Rd close to Woodbridge) if you want to come by sometime and compare notes. Good luck!