Guides
Plan
Size, site and line the pond before you dig.
Size and depthHow big should a garden pond be?
RHS depth and surface-area figures for a UK garden pond, plus shelves, a beach edge and a worked example.
Liner sizeWhat size pond liner do I need?The liner sum used for UK ponds — length and width plus twice the depth plus overlap — and why underlay is not optional.
CalculatorPond plannerA browser calculator for pond volume, liner size, pump flow, filter rating, UV watts and yearly running cost.
Preformed or linerPreformed pond or a liner?When a rigid shell is enough, and when the RHS points you to a flexible liner and a beach.
SitingWhere should a garden pond go?Sun, shade, trees, buried services and child access, using RHS siting advice for a new UK pond.