Aquascape® Small Pondless® Waterfall with 6' Stream Flow Rate at 20 Feet of Head_3127 GPH Prevents leaves and debris from

Prevents leaves and debris from falling into pond

25" across bottom and 19-1/2" top to bottom)

Here's a great Design and Installation guide from Savio for your reference

Use adequate screening on pump inlet to prevent debris from plugging nozzles

Aquascape® Small Pondless® Waterfall with 6' Stream Flow Rate at 20 Feet of Head_3127 GPH Prevents leaves and debris fromProvide the sight and sound of cascading water into any landscape setting with Aquascape's small entry level professional Pondless Waterfall Kit. Includes enough liner to create a short 6' waterfall and stream. Kit Includes: 10' x 10' 45 mil Liner, 100 sq. ft. Underlayment 10' x 8' 45 mil Stream Liner Pondless Waterfall Vault Waterfall Spillway Three Small AquaBlox AquaSurge PRO 2000 4000 Pump 1. 5" x 25' Flexible PVC Pipe Pump Check Valve Assembly