Functions Of Pond Liners
The estimated size of pond liners always depends both on the height and the distance the water must be carried. For every three meters of horizontal distance the water must be moved, you need to factor in a height of 0.3 meters. The total height is determined by measuring from the water level of the pond to the top of the waterfall or fountain. It is very necessary that we should estimate correctly where pond liners are going to be installed.

Ponds should ideally circulate the total volume every hour but once every two hours would suffice as an absolute minimum. There are, however a good number variables involved that can affect flow rates such as the length and diameter of the pipe work, the number of bends and tightness of each, type of filter used and whether a fountain in being run off the same pump. With so many possible variables, it is advisable to go for a pump that gives a higher flow rate than you think you need as the flow rate can always be restricted to reduce it, but you can not increase the flow rates above as the flow rate above the pond liner maximum output.