In a confined aquifer, two piezometers installed $400\text{ m}$ apart in the direction of flow show hydraulic heads of $65.0\text{ m}$ and $63.0\text{ m}$. The aquifer has hydraulic conductivity $K = 25\text{ m/day}$ and porosity $n = 0.25$. The actual pore velocity (seepage velocity $V_s$) of groundwater in meters per day is ________ (round off to 1 decimal place).