Filtration

Design the removal path first

Rehearse taking out foam, closing taps and removing an impeller before fixing decor. Moving rocks for every service guarantees delay.

Cabinets need moisture tolerance, heat escape and a visible floor for leak checks.

Filtration

Avoid a decorative dead chamber

Dense planting catches leaves in front of intakes. Increase area and make local siphoning possible.

Measure flow again after screening: aesthetics changed the hydraulic circuit.