Slow Sand Water Filter

Prototype unit I built to help me get a better feel for what kind of filtration rate (GPM/sq.ft.) I might expect to see on a larger system (think, rainwater collection.) This one only sees about .5 GMP/sq.ft. which is pretty low. Gonna try different amounts of media. Looking to get 2… 3 max GPM/sq.ft. Gravel, [...]

Source: Water Filter