A large aquarium layout featuring Harmony (AGA 2025 #1418), 231 L (61.0 gal.), Dutch style, by Tracy Ruhlman. Black lava rock supporting the bolbitis set the depth lines of the frame.
Hardscape (Black lava rock supporting the bolbitis) forms the skeleton — negative space between wood and stone guides the eye from foreground to depth. About 12 plant species are listed — fine for a multi-layer look, but keep a care log so slower species are not shaded out. Aqua Natural Black Galaxy Sand substrate helps stabilize root-zone nutrition in the early weeks.
Week Aqua P900 Pro at 60 par at the substrate level lighting sits at a moderate-to-high technical level for this large aquarium. CO₂ (65 ppm CO2, beginning 3 hours before lights turn on, continuing until they turn off, so 11 hours total) — see our CO₂ systems if you want to clone a similar setup. Fluval Fx 4 filtration needs enough turnovers without blasting the hardscape; browse matching filters.
Lighting, filtration, substrate, and plant details sit in the specs table below, or browse more layouts in Dutch style.
