AquaBlox: more water storage beneath your waterfall

AquaBlox are modular water-storage boxes that sit inside a lined reservoir. They keep most of that space open for water instead of filling it with stone, making them useful beneath pondless waterfalls, intake bays and larger water features.

Choose Small AquaBlox for a shallower module or Large AquaBlox for more storage per module. For bigger builds, compare the small pallet pack and large pallet pack. Replacement panels are also available; a panel is not a complete box.

The boxes store and support the water space; the liner and protective underlay make the excavation watertight. A reachable pump vault or access chamber completes a practical reservoir.

Should I choose Small or Large AquaBlox?

Choose around the available excavation depth and the storage volume your feature needs. Small modules suit a shallower reservoir; Large modules provide more storage per box. Check the assembled dimensions and allow space for the pump chamber and access. Complete modules include their panels; replacement panels are only needed when repairing an existing box.

Installation and planning advice

How much water storage do you need?

Start with the water that leaves the reservoir while the feature is running. The stream, waterfall and pipework all hold water away from the pump. Allow enough reserve for that operating drawdown, normal evaporation and splashing, without exposing the pump intake. When the pump stops, the reservoir must also accommodate water draining back.

Small or large modules?

Compare the assembled height, storage capacity and number of modules needed for your excavation. The product pages give the dimensions for the supplied model. Choosing the shallowest box is not always the smallest overall excavation: a taller module can provide more storage in the same footprint. Keep space for the pump chamber and servicing rather than filling every corner with boxes.

Prepare the reservoir before the boxes go in

Form a stable, level base and remove sharp objects. Install appropriate underlay, liner and protective layers to the manufacturer’s layout, then assemble and position the modules. Plan pipe routes and service access before adding gravel or rock. The completed installation’s load capacity depends on its preparation and covering; the box rating alone is not permission to drive over a water feature.

Using AquaBlox in a wetland filter

In a constructed wetland, the boxes provide an open settlement and water-distribution area beneath the filter bed. They are not the same as FilterBlox biological-media modules. See the wetland filtration guide for the roles of the Centipede and Snorkel components.

Replacing panels or ordering in quantity

For a damaged box, compare the panel shape and dimensions with AquaBlox replacement panels. For a new reservoir, order complete modules or the correctly sized pallet pack. That keeps the build quantity straightforward and avoids mistaking a loose panel for a complete storage module.

Compare Small and Large AquaBlox

Complete module Dimensions (supplier listing) Water storage
Small 673 × 406 × 241mm 64 litres
Large 673 × 406 × 445mm 121 litres

Both sizes are also offered in pallet packs of 52. Choose by reservoir depth and required storage; a replacement panel is not a complete module. The catalogue rounds some dimensions, so use the selected product’s installation specification when setting out.