Install Under-Gravel Filtration System (AquaBlox)

What happens here

Excavate a trench to house the under-gravel filtration system. This system consists of black corrugated pipes (AquaBlox water distribution) laid horizontally, surrounded by river rock. The main component is a series of black plastic crates called AquaBlox, which are placed over the water distribution pipes. The video explains that these crates are modular, designed for H-20 loading (heavy vehicle traffic), and are intended to create 'mixed flow' turbulence for optimal biological filtration.

Goal: Establish a robust and efficient biological filtration system beneath the pond's gravel layer.