25-gallon cube refugium/filter

I designed and built it myself. It's inside the tank and mounted to the back.

The overflow area now has an initial filter pad, some Eheim ceramic balls (has weird German name), Charcoal and another filter pad.

That drains into a tank below that is filled with live rock rubble and live sand.

That then drains into the middle compartment that I put in live sand, live rock rubble, a bunch of cheato and six small red mangroves.

That then passes to the return on the far right where it is pumped back into the tank.