| Flow meter or water meter.
A bit different. Water meter, like the one for your house, lets the water company know how much water you've used. Also imortant for filling a pond, duh..
Flow meters are in two categories. The inexpensive one will roughly tell the gph, but do not allow them to be in the sun as alge will cloud the reading.
Sac Koi has a digital meter, about $250.00 which is very accurate.
Ed |