---
title: Frodo stone in a terrarium | Glass Jar Garden
description: Frodo stone: Grey-brown angular rock with deep ridges, sold for aquascapes. In the jar it has holds water 1 % by volume, pore space 3 % by volume, weight...
url: https://glassjar.garden/guide/hardscape/frodo-stone/
---

Stones and wood

# Frodo stone

Grey-brown angular rock with deep ridges, sold for aquascapes.

## What the simulation uses

- Holds water: 1 % by volume (Water it keeps after draining; the rest runs down to the drainage.)

- Pore space: 3 % by volume (Room for air and water between grains; low means roots suffocate when wet.)

- Weight: 2550 g/L (How heavy a litre is.)

- pH: 7 to 7.5 pH (How acid it keeps the soil.)

## Description
Grey-brown angular rock with deep ridges, sold for aquascapes. It is dense, holds almost no water and leaves pH near neutral.

Also called mini landscape rock.

Estimated, where sources were thin: look authored for the app; physical values estimated.

[Grow it in a jar](https://glassjar.garden/?guide=hardscape/frodo-stone)

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