Bottle Biosphere Guide Better Full Site

: About 8 cm of high-quality potting soil or peat-free coir compost. For tropical plants, a mix containing sphagnum peat moss or coco coir is ideal. Step-by-Step Construction Guide

: A thin coating of activated charcoal over the pebbles. This acts as a filter to keep the water "sweet" and prevent the growth of odors or harmful bacteria. bottle biosphere guide full

To function as a closed system, your biosphere must include specific layers that handle drainage and filtration: : About 8 cm of high-quality potting soil

: Ensure your container is thoroughly cleaned and dried. Wide-mouthed jars are easier for beginners, while narrow-necked bottles offer a classic "ship-in-a-bottle" aesthetic but require specialized tools like long tweezers or chopsticks. This acts as a filter to keep the

: A 3–5 cm base of small rocks, pebbles, or horticultural grit. This prevents water from pooling at the bottom and rotting the plant roots.

Lower them into the bottle and use tools to press the soil firmly around the roots.