Join Date: May 2009
Location: Clear Spring, Maryland, USA
Building a sump??
I'd like to try building my own sump for a new tank setup, but I'm a little fuzzy on the details. I get the part about sizing the outflow pipe to match, more or less, the pump flow rate, but how do you actually control and balance it?? On the one hand you essentially have an open pipe siphoning water into an open box, the sump, where your filter material is located and then your pump pushes water back up into the tank. Obviuosly the flow rates have to be balanced or the thing won't work. That's the part I don't understand. Since the siphon and pump aren't connected, they're working independently. How do you get the siphon rate to match the pump rate?? What happens as the media begins to load up and your return rate from the pump to the tank drops? The siphon isn't connected to the pump, so the siphon rate isn't going to self adjust to match the lower pump flow, is it??? It sounds very simple to set up and I know thousands of people use them, but I don't see how you get the thing to balance input to output flow?!