WIO > Nano Stones

The same WIO stone families, scaled for small tanks. This is a more useful category than it first appears, because the commonest mistake in nano aquascaping is using rock that is correct in every way except size — and a single oversized stone will flatten a 5 or 10 gallon tank no matter how good it is.

Why nano stone is a different product, not just a smaller one

Scale in an aquascape is relative. A 12 kg box of stone contains pieces sized to look like cliffs in a four-foot tank; drop one into a nano and it reads as a boulder in a puddle, because there is nothing left for it to be large against. Nano stone gives you pieces with enough internal detail — texture, veining, crevices — to read as a full-size formation at close range.

The corollary: in a small tank people look closely. Detail matters more than mass. Web and Bumblebee, with their fine veining and banding, reward that attention in a way a plain gray rock does not.

Families available at nano scale

• Black Venom — near-black and heavily textured, in both nano stone and nano boulder form. The strongest contrast against green plants in the range.
• Bumblebee — banded light and dark. One piece is a focal point; three compete with each other in a small tank.
• Jade — green-gray and quiet, the easiest of the families to build with and the least likely to argue with your plants.
• Inferno — warm rust and ochre, good under warm lighting and with red stems.
• Web — pale with fine dark veining. The most detailed at close range, which is exactly what a nano rewards.
• Druid — available in the nano boulder format.

Bags run 1.5 to 2 kg, which is a complete hardscape for most tanks under about 10 gallons.

Stones or boulders?

The nano stone pieces are more angular and layered, and suit stacked, stratified layouts — think exposed rock face. The nano boulder pieces are rounder and more weathered, and suit river-bottom scapes where the water has smoothed everything. Mixing the two in one tank usually reads as indecision; pick a form and stay with it.

Composition at small scale

One caveat that matters far more in a nano than in a big tank: the ratio of rock to water is enormous. A stone that raises hardness slightly in a 75-gallon tank can move a 5-gallon tank by a full point or two of KH, and keep moving it.

WIO does not publish chemistry data, so test it yourself — a drop of white vinegar on a dry surface, fizzing means carbonate. If you are running a Caridina shrimp nano or anything soft-water, that ten seconds is worth taking. On San Diego tap with Neocaridina or community fish, it is a non-issue. The general principle is on our aquascaping stones page.

Building small

Fewer pieces than you think. One dominant stone and one or two supporting, placed off-center, with the substrate sloped up behind them. Leave open foreground — empty space is what makes a nano look composed rather than crowded, and it is the hardest discipline in small-tank scaping.

Bury the bases so the stones look like they emerge from the substrate rather than sit on it.

Matching the rest

The nano families match the sands and riverbeds by name, so a Jade nano stone over a Jade Bliss riverbed is a coordinated scape out of the box. See also full-size WIO stones and our aquascaping workshops, which build a complete nano scape in an hour — hardscape, substrate and plants included.