Species description

Care, breeding and tankmates

Plant profile

Placement

Foreground

It must be attached to rocks or driftwood, ideally in shaded or semi-shaded areas of the midground or background. The rhizome should remain fully exposed to the water current to prevent rotting. Its placement should be permanent, as it dislikes being disturbed once established.

Botanical form

Rhizome

Originating from the Sungai Kabo region in Borneo, this fern features uniquely shaped, highly translucent, and deeply pinnate leaves. The fronds are relatively small and delicate, spreading from a creeping, wiry rhizome. Its elegant, almost fragile appearance makes it a prized collector's plant.

Growth

Slow

This species has an exceptionally slow growth rate, taking months to develop a substantial number of fronds. Injecting CO2 and providing a gentle water current can marginally improve the speed and health of its growth. Patience is essential when cultivating this rare fern.

Substrate

None

Bolbitis sp. "Sungai Kabo" follows the typical epiphytic growth habit of its genus, requiring hardscape rather than a traditional aquarium substrate. The creeping rhizome should be secured to wood or stones using thread or specialized plant glue to prevent suffocation and rot. Its root system is designed for mechanical gripping rather than nutrient absorption, meaning the plant relies entirely on liquid fertilizers present in the water column.

Column fertilization

Recommended

Liquid fertilization should be dosed sparingly, focusing primarily on trace elements to keep the fronds vibrant. High concentrations of nitrates and phosphates are unnecessary and often counterproductive. A clean water column with stable parameters is more important than heavy fertilization.

Root fertilization

None

Being a true epiphyte, it derives no nutrients from the substrate and therefore does not require root tabs or aquasoils. It relies solely on the water column for its nutritional needs. Planting it in soil will quickly lead to rhizome decay and plant death.

Trimming

Occasional

Trimming is rarely needed due to its slow growth, but dead or algae-infested leaves should be carefully removed. Always snip the leaf stalk as close to the rhizome as possible using fine-tipped scissors. Avoid damaging the main rhizome, as recovery from injury is extremely slow.

Propagation

Rhizome division

Propagation is achieved by carefully dividing the rhizome, ensuring each piece has a healthy growing tip and several fronds. The cut sections should be firmly but gently tied to a new piece of hardscape. Cyanoacrylate glue can be used, but use it sparingly to avoid burning the delicate tissue.

Sensitivity

Moderate

It is highly sensitive to fluctuating water parameters, high temperatures, and excessive light. Algae is its primary threat, as it easily smothers the slow-growing leaves if water quality declines. It strongly prefers soft, slightly acidic water mimicking its natural Bornean habitat.

Layout role

Midground, Foreground, group, Epiphyte

It is an exquisite focal point or detail plant for high-end aquascapes and biotope aquariums. Its transparent, elegant fronds add a sense of refined age and mystery to shaded hardscape crevices. It contrasts beautifully with darker mosses and broad-leaved Anubias species.