Hardscape is the bones of an aquascape - everything else (plants, fish) plays off it. Common rocks: Seiryu (high-pH, dark blue-grey, classic Iwagumi), Dragon Stone / Ohko (textured, lava-like), Frodo stone (similar to dragon, black-grey), lava rock (porous, biofiltration bonus), Texas holey rock (high-pH, cichlid favorite), pagoda stone (tiered, easy to stack). Common woods: spider wood (intricate branches, leaches tannins for 6-12 months), Malaysian (heavy, sinks), mopani (dark, lots of tannin), manzanita (light, branchy), cholla (small, shrimp-friendly). Layout principles: golden ratio (focal point at 1/3 + 2/3 lines), triangular composition, odd-number rocks (3, 5, 7), depth gradient (largest in front, fade to back). Iwagumi style: minimalist - 3 + 5 + 7 stones with carpeting plant. Dutch: dense plant focus, minimal hardscape. Nature aquarium: Amano-style mixed - hardscape + carpets + stem plants.
Reviewed by the Fast Aquatics husbandry team · Updated May 2026
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