Pond/Water-Feature Volume Calculator Verification Checklist PDF

Full QC Checklist+

Verify site measurement and shape selection, excavation and liner installation, pump/filtration and plumbing, and stocking/finishing.

✓21 Inspection Points

✓4 Verification Categories

✓Site Measurement & Shape Selection+

Pond length/width (or diameter), average water depth, AND maximum water depth all confirmed from an actual site layout, not assumed or guessed
Maximum water depth entered is the pond's actual DEEPEST point, not the same number copied from the average depth field
Selected shape (Rectangular, Circular, Oval, or Irregular/Kidney) matches what will actually be excavated
Average depth entered is a true AVERAGE across the whole basin, not the deepest point
(Irregular/Kidney shape) Considered breaking a highly irregular footprint into rectangular sub-sections and summing them, for a more accurate volume than the single 0.75x approximation
Underground utilities (irrigation lines, low-voltage lighting/wiring, gas, sewer/septic lines) located and marked before any excavation begins

✓Excavation & Liner Installation+

(Marginal shelf enabled) Excavation actually cut with a distinct shelf ledge at the planned shelf width and depth, not a single uniform basin depth
Underlayment (padding) installed under the liner across the full excavated area, with no sharp rocks or roots left underneath
Liner dimensions (length x width) confirmed against this calculator's own figures before cutting or ordering a pre-cut liner
Liner draped and settled into the excavation with minimal sharp folds or wrinkles, especially at the shelf ledge and any corners
Liner edge properly anchored (buried in a trench, weighted with edging stone, or similar) and trimmed only after the pond is filled and has settled

✓Pump, Filtration & Plumbing+

Pond Type selection (Water Garden, Lightly/Heavily Stocked Goldfish, or Koi) matches the actual planned stocking, not left at a default
Purchased pump's RATED flow at your actual installation's head height and tubing run meets or exceeds this calculator's recommended GPH — not just the pump's zero-resistance box rating
(Waterfall/spillway enabled) Chosen flow preset (Light/Thin Sheet vs. Heavy/Full Curtain) matches the actual look wanted, and the combined GPH figure (turnover + waterfall) — not just the turnover figure — was used to size the pump
(Cold climates) Plan in place for freeze protection — deeper water for overwintering fish, a de-icer/aerator, or full winterization of pumps and plumbing
Pump, lighting, and any other pond electrical equipment run through a GFCI (ground-fault) protected outlet or circuit

✓Stocking & Finishing+

Fish stocking figure treated as a general planning guideline, not a strict stocking limit
Pond water treated/dechlorinated and, ideally, cycled (established beneficial bacteria) before adding fish
(Marginal shelf enabled) Marginal/shelf plants selected match the shelf's actual planted depth, not the main basin's deeper water
Delivered liner, underlayment, and pump specifications cross-checked against this calculator's own figures before installation begins
Predator and/or child-safety barrier (fencing, netting, or similar) considered for the finished pond, especially where young children or pets have yard access

Inspection Notes+

Use the latest approved drawings, specifications, and site measurements.

Complete all critical checks before proceeding to the next work stage.

Record deviations and confirm rectification where required.

Inspection Notes

Use the latest approved drawings, specifications, and site measurements.

Complete all critical checks before proceeding to the next work stage.

Record deviations and confirm rectification where required.

Use it after collecting the project inputs and again before approving or closing the relevant work stage.

No. It supports verification but does not replace approved drawings, specifications, codes, manufacturer requirements, or professional inspection.