Love that design with the water flowing from underneath!Neat and Clean Diagrammatic Form:
The ugly realized version:
The Evian bottle is a $5 ATO, over on the right just out of frame is a 500ml bottle connected to the tank via an air hose siphon with a knot in I use to drop dose, the funnel on the left with the pvc is for dropping food in so it sinks down to the return pump and gets circulated in the tank for the fish to chase. I forgot I also have a carbon reactor I use occasionally in the same chamber as the return pump. For various reasons I also run it with the water a little above the final baffle as a default, partly just because that’s where it needs to be for the basic ATO.