Ill post some more pics later this AM.
My basic setup: I'm using a 30 gal
for my sump divided in 3. Divider in right has 2-3 in gap on bottom. Divider on left has gap on top. PVC
from tank goes to a "t" connection. Right side goes to right chamber which is main filtration area. Drains onto a drip plate. Under drip plate is white filter felt and then blue/white filter pad. That sits on egg crate. Below egg crate is pot scrubbies which sits on another egg crate to keep it 3-4 inches off bottom. Its important to keep them out of water...you want the water running g through them to grow the BB. Water drains through some more filter pad to center which is return area. The left chamber normally holds a seeded sponge filter for use in other tanks.