Is there anyway of making a sump and not having to drill a tank to use it. I don't know much about these sumps and exactly how they work. I've been using the search thing but just don't completely understand it all.
I understand that the pump will pump up the water to the tank, but how does it get back down to the sump then? I'm lost.

I understand that the pump will pump up the water to the tank, but how does it get back down to the sump then? I'm lost.
