Java moss
Taxiphyllum barbieri
Also known asCommon moss · Bogor moss
Water parameters
Light and nutrients
Substrate type: epiphyte. Propagation: fragmentation.
Substrate compatibility
| Substrate | pH effect | Nutrient load |
|---|---|---|
| Wood and rock mounts (Hardscape mount) | varies | none |
| Inert sand (Pool filter sand) | neutral / inert | none |
| Inert gravel (Aquarium gravel) | neutral / inert | none |
| Limestone gravel (Crushed coral) | raises pH | none |
| Bare bottom (no substrate) (Bare bottom) | n/a | none |
| Aquasoil (ADA Amazonia) | lowers pH | very high |
| Mineralized clay substrate (Seachem Fluorite) | neutral / inert | moderate |
With fish
Origin and habitat
The most-used aquarium moss in the world, Java or Bogor moss, Taxiphyllum barbieri, family Hypnaceae, native to Southeast Asia. It was originally described as Isopterygium barbieri from Vinh in Vietnam, and it reached European aquarists in 1968, where it was first misidentified, first as Glossadelphus zollingeri and later confused with Vesicularia dubyana; both V. dubyana and T. barbieri are still sold as 'Java moss', though T. barbieri is the common one. It grows as a tangled, branching mass of fine stems with tiny rounded leaves and, having no true roots, anchors to rock, wood or soil by rhizoids in humid streamside habitats. In the aquarium it attaches to almost anything and forms dense bushy clumps. Cheap, available and nearly unkillable, it is the default moss for most keepers.
Outdoor pond use
- USDA zones
- 8–13 (winter low around -12°C or warmer)
Care notes
The easiest aquarium moss. It grows in almost any light, including very dim, across a wide temperature range though it does best in the cool 20s Celsius and stalls in warm water, in any water chemistry and with no CO2. Having only rhizoids and no roots, it needs no substrate: tie or glue it to driftwood, rock, mesh or a coconut shell and it grips in three or four weeks, or just let it float. Growth is moderate, roughly doubling in a month or two. Because it grows every which way with no set shape, it piles into ever-denser clumps that trap detritus and shade out their own interior, so trim it now and then to keep it open. It is the single most useful plant for shrimp tanks, the dense fronds harbouring biofilm to graze, hiding shrimplets and catching food, and in breeding tanks it catches and protects scattered eggs from tetras, barbs and danios. Propagate by tearing off any piece and reattaching it. Its messiness next to structured mosses like Christmas or flame moss is the only real knock against it. It is an ornamental moss, not a crop, so it is unsuited to media-bed aquaponics or hydroponics.