So how many GPM might go through a coffee filter with gravity instead of pressure? All of the solid waste that accumulates in my tank from the yellow perch sits in one particular area, so I could put the pump inlet in that spot. I priced little home waterfall pumps at about 30 dollars that did about 2 gpm. If that falls on a coffee filter it will just spill up and over the top, right?

Holding a redear sunfish is like running with scissors.