The best plants for a shrimp tank (and why moss wins)

The short answer

If you are only going to put one plant in a shrimp tank, make it a moss. It grows grazing surface, and it hides newborn shrimplets (baby shrimp) while they are too small to outrun anything.

The other good options have a lot in common: slow growing, low light, attached to wood or stone rather than rooted. No CO2 (no injected carbon-dioxide gas), no high light, no complicated fertiliser routine.

Why moss wins

Biofilm is the main food source in a mature shrimp tank: a thin layer of bacteria, diatoms, algae and other micro-organisms on any wet surface. How much a tank supports depends on both surface area and nutrients, and moss is commonly credited with more surface per litre than most plants, though that is a hobby comparison rather than a measured figure.

The second job is cover. Shrimp Zone ships unsexed juveniles (young, not yet sexable) at 0.6 to 1.2 cm, and shrimplets born in your own tank are smaller again, roughly 2 mm at hatching. At that size almost anything eats them, including fish you would otherwise call shrimp-safe. Keepers widely report better shrimplet survival in heavily mossed tanks, though that is hobby experience rather than a controlled result. If you are starting a breeding colony, moss is the piece to get in early.

Java moss and the alternatives

Java moss is Taxiphyllum barbieri, still often sold as Vesicularia dubyana, a name that properly belongs to Singapore moss. Trade naming is genuinely muddled and several moss identities are unsettled, so buy on appearance rather than label. It is commonly reported as tolerating roughly 15 to 28 °C, though the upper end varies between sources. Tie it to hardscape (rocks and wood) with cotton thread or wedge it into a crevice. It traps detritus (waste debris), so siphon around it rather than through it. Christmas moss (Vesicularia montagnei) is tidier and flame moss (Taxiphyllum sp. 'Flame') grows upright. Süsswassertang needs no attaching and is excellent shrimplet cover; it is a fern gametophyte (a fern's early life stage) rather than a true moss, usually listed as Lomariopsis lineata, though that identification is disputed.

Anubias, Bucephalandra and Java fern

All three attach to hardscape and share one rule: the rhizome, the thick horizontal stem the leaves and roots come off, must stay above the substrate, or it tends to rot. Tie them to wood or stone, or glue them with plain cyanoacrylate gel.

Anubias barteri var. nana and 'Petite' are about as forgiving as aquarium plants get, and the broad leaves work as flat biofilm plates. In brighter tanks they collect green spot algae, which is cosmetic rather than harmful, but do not expect the shrimp to clear it: they graze soft film and leave hard green spot algae alone. Bucephalandra species are aroids (arum-family plants) endemic to Borneo — found nowhere else — that suit nano (very small) tanks; most stock is grown emersed (above water) and melts (sheds its old leaves while adjusting) after it goes in, but while the rhizome stays firm and green it will usually recover. Java fern (Microsorum pteropus, increasingly listed as Leptochilus pteropus) is bulk structure rather than fine cover, so pair it with moss and keep the plantlets that form on older leaves. Its own melt has no settled explanation: potassium deficiency, too much light, sustained warmth and the emersed-to-submersed transition all get blamed.

Floaters

Floaters take up nitrogen fast, so thinning the mat and binning the excess genuinely exports nutrients; leaving the growth in place only stores it. Their trailing roots are good biofilm surface, and they shade the tank, which many keepers find makes shrimp bolder and better coloured, though that is anecdotal rather than measured. Keep coverage between half and two thirds of the surface, because a full mat cuts gas exchange (oxygen in, carbon dioxide out at the surface). Duckweed works but is effectively permanent once introduced.

Australian keepers have an extra step. Salvinia molesta, water hyacinth (Eichhornia crassipes, now often placed in Pontederia) and cabomba (Cabomba caroliniana) are Weeds of National Significance and are prohibited. Amazon frogbit (Limnobium laevigatum) is a standard overseas recommendation but is declared or restricted in several Australian states, so it is not a safe default here; check red root floater (Phyllanthus fluitans) against your own list too, since the status varies between states. Never put plants, trimmings or tank water down a stormwater drain or into a creek.

The part that quietly kills colonies

A stable tank can lose most of its adults within a day or two of a new plant going in, and the plant looks healthy throughout. Three risks get conflated.

Pests. Dragonfly and damselfly nymphs (their aquatic larvae) are the hitchhikers that genuinely hunt shrimp, and our guide to shrimp tank pests covers identifying them and everything else that arrives on a plant.

Pesticides. Nursery-grown plants may carry insecticide residue. Insecticides target arthropods (insects and their relatives). Shrimp are arthropods.

Copper. Copper is a question of dose. Shrimp require it in trace amounts: it is central to haemocyanin, the copper-based protein that carries their oxygen, and it has a role in moulting. What kills is a high enough dose, which in practice means copper-based fish and snail medications, and measurable free copper in the water column. The route specific to plants is residue from the copper sulfate dips some sellers use to sell plants as snail-free, so the spotless plant can be the one to be sceptical of. The trace copper in a plant fertiliser dosed to the label is a different matter, and there is no reason to strip copper out of ferts or food. Why are my shrimp dying covers what a copper event looks like and what to do about it.

A quarantine routine

1. Rinse everything thoroughly under a running tap.
2. Set up a bare 3 to 5 litre tub with dechlorinated water (tap water treated to remove chlorine) and 6 to 8 hours of light a day. No shrimp, no substrate, and a heater if the room drops below about 18 °C.
3. Hold the plants there three to four weeks, longer if you can, changing 100% of the water twice a week. Time and dilution are what remove leachable residue; the period is a hobby convention rather than a tested figure.
4. Inspect at every water change. Remove snails and the clear jelly egg clutches, and look for hydra and flatworms.

Tissue culture cups are the lowest-risk source generally available, grown sterile on gel, so they should carry no snails, pests or pesticide residue, though the occasional cup does arrive contaminated. Rinse every trace of gel off or it feeds a bacterial bloom.

Dips kill pests, not pesticides

An alum (aluminium sulfate) soak, a 3% hydrogen peroxide dip or a short bleach dip will all kill snails, eggs and hitchhikers, though published concentrations and contact times vary a lot between sources, so treat any single recipe with caution. Bleach kills moss outright and peroxide is rough on moss and Bucephalandra. None of them remove pesticide already taken up into plant tissue, which is why a dip supplements quarantine rather than replacing it.

Late winter notes for Australian tanks

Cold is the current risk, not heat. A quarantine tub in an unheated laundry at 12 to 14 °C stalls growth and slows the leaching you are relying on, so keep it warm and near your display tank temperature, the same problem covered in keeping shrimp through an Australian winter. If plants and shrimp are arriving in the same month, plant first, so biofilm has established before livestock lands. Our shrimp care and acclimation guide covers arrival day itself.

Putting it together

A workable shrimp tank is a sponge filter (a simple air-driven foam filter), wood with moss tied to it, two or three Anubias, one Bucephalandra, and floaters over half the surface. Six to eight hours of light. No CO2.

Every plant on this list suits either genus, so the water is the part to get right rather than the planting: the numbers are in our Neocaridina water parameters guide and our Caridina and Taiwan Bee guide.