What equipment is needed to make a sump? What would one suggest for the materials in the sump for the 125? Thanks for the answers to these questions because I am confused with the endless possibilities for wet/dry.
i think in the DIY section there is a sticky about this... but badiscally its a tank with different steps of media... you want the water to move slow so it have more time to hit air and bacterial... .. and you want a return pump to the tank thats about it.. soudns simple but there are as you said endless amounts of options