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Fissidens fontanus

Fissidens fontanus

Fissidens fontanus is an aquarium plant belonging to the Fissidentaceae family, characterized by a medium growth rate and ideal for placement in the foreground.

Taxonomy
Class:Liliopsida
Order:Dicranales
Family:Fissidentaceae
Genus:Fissidens
Species:Fissidens fontanus

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Water Temperature

4 - 26 °C

pH Value

5 - 7.5

Water type

Freshwater

Light

Medium - High

CO2

Low

GH

0 - 20 dGH

KH

0 - 14 dKH

Species description

This fascinating aquatic species has its geographical origin in the warm tropical regions of Asia and South America, where it inhabits clear river systems with weak to moderate current. It is commonly found both submerged and partially emersed along sandy or muddy banks. Additionally, its occurrence is highly associated with shaded banks and shallow water basins. From a taxonomic point of view, it belongs to the Fissidentaceae family and is assigned to the Fissidens genus. Its genetics reflect a high degree of adaptation to seasonal variations in water and chemical parameters of its native waters, assuring its resilience.

Care, breeding and tankmates

The ideal water chemistry includes a slightly acidic or neutral pH (5.0 - 7.5) and a moderate carbonate hardness KH (0.0 - 14.0). The optimal water temperature must be kept stable between 4.0 and 26.0 °C. The main risks are related to the development of parasitic algae on old leaves and tissue necrosis if essential nutrients are lacking. Good filtration and regular water changes prevent most diseases.

Geographic Origin and Distribution

This species originates from: zone tropicali dell'Asia e del Sud America.

Origin

South and Southeast AsiaExtra-Amazon South America

Plant profile

Placement
Foreground

It is a true epiphyte that should be attached to driftwood branches or stones. It looks best in the midground to foreground where its weeping growth habit can be appreciated.

Botanical form
Epiphyte

It features exquisite, feather-like fronds that resemble the plumage of a phoenix or miniature palm fronds. The fronds are soft, dark green, and cascade naturally downward.

Growth
Medium

It exhibits a slow to moderate growth rate once established. It typically requires a period of acclimation before it begins to actively send out new fronds.

Substrate
High

Fissidens fontanus, commonly known as Phoenix Moss, is a true epiphyte that naturally attaches itself to hardscape and requires no substrate whatsoever. It produces delicate rhizoids that grip onto wood or porous rocks, allowing it to form lush, fountain-like mounds. Because it draws 100% of its moisture and nutrients from the surrounding water column, a nutrient-rich soil is completely unnecessary for its cultivation. It should never be buried in gravel or soil, as covering its structure will cause the moss to rot and deteriorate.

Column fertilization
Recommended

A mild liquid fertilizer routine works best for this moss. While CO2 injection is not strictly required, it significantly boosts its growth rate and increases frond density.

Root fertilization
None

As an epiphyte, it utilizes rhizoids instead of roots to anchor itself; it draws all its nutrition directly from the water column. Substrate fertilizers are completely ineffective.

Trimming
Occasional

When the moss mound becomes too thick, the lower portions may die off from lack of light and water flow. Carefully thin it out using sharp scissors and pull away loose strands.

Propagation
Cuttings

Propagation is very easy: simply tear or cut small portions of the moss and tie them onto new hardscape surfaces using cotton thread, fishing line, or cyanoacrylate gel.

Sensitivity
Moderate

It is very sensitive to liquid carbon treatments and chemical algaecides. It demands clean, well-oxygenated water to prevent hair algae from intertwining with its delicate fronds.

Layout role
Nano, Foreground, group, Epiphyte, Midground

It is arguably one of the most beautiful mosses for aquascaping. It creates a weeping, deeply textured dark green layer over hardscape, giving a timeless and serene appearance.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

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Last updated: 06/16/2026
Fissidens fontanus Care Guide & Tank Setup | Atlarium