Elatine Hydropiper care guide
Elatine Hydropiper (Elatine hydropiper) — high light, 18-25 °C, pH 6-7.5, CO2 recommended.
Compiled by Aquairi from published sources · Published · Updated
Overview
Elatine Hydropiper (Elatine hydropiper) is an aquatic plant of the family Elatinaceae, listed in the Aquairi knowledge base as an intermediate-level species. It is typically grown under high light with pressurised CO2 injection on any substrate. Tiny carpet plant with small lance-shaped leaves on creeping stems. Forms a fine green lawn in cooler tanks; less heat-tolerant than Monte Carlo but easier than HC Cuba.
Taxonomy
- Family: Elatinaceae
- Genus: Elatine
- Scientific name: Elatine hydropiper
Habitat
Elatine is a near-cosmopolitan genus of tiny amphibious plants (Elatinaceae) of pond margins and seasonally flooded ground; dwarf forms make fine foreground carpets. In the Aquairi knowledge base, populations associated with this form are recorded from Europe.
Growth requirements
- Lighting: high
- CO2: recommended
- Temperature: 18-25 °C (64-77 °F)
- pH: 6-7.5
- GH: 3-12 °dGH
- Substrate: aquasoil
- Maximum height: 3 cm
- Growth rate: medium
- Recommended placement: foreground carpet
Placement
A foreground carpet for high-energy tanks; strong light and CO2 keep the leaves tiny and the mat tight, while low light forces vertical growth. In the Aquairi knowledge base this form is recommended for the foreground as a carpet under high light with pressurised CO2 injection, using undefined.
Propagation
Spreads by creeping stems that root at the nodes; trimmed portions replant and the mat thickens quickly under good conditions. Documented propagation techniques for this entry include: stem cuttings.
Common issues
Demands bright light and CO2 to stay compact; under shade it stretches and thins, and trapped debris encourages algae on the fine foliage.
Propagating Elatine hydropiper (Waterwort)
Overview
Elatine hydropiper, the eight-stamened waterwort, is a small flowering plant in the family Elatinaceae with a native range spanning Europe to the Russian Far East. In the aquarium it grows as a low creeping carpet, knitting a fine green lawn across the foreground on horizontal stems. Note that some plants sold under this name in the trade are actually Micranthemum 'Monte Carlo', so verify identity before propagating.
Propagation Method (Cuttings)
Two complementary methods work for this carpeting species: taking cuttings from the creeping runners and splitting an established mat. As the horizontal stems creep, they root at intervals along their length, so each rooted segment can become an independent plant. Lifting and dividing the dense mat gives you many starter portions at once.
Step-by-Step
- Once the carpet is dense, gently lift a section of the mat with tweezers, keeping roots attached.
- Tease the mat apart into small clumps, each with several leaves and a few roots.
- Alternatively, snip a 3-5 cm length of creeping runner that already carries fine roots.
- Replant each clump or runner shallowly into the substrate a short distance apart.
- The replanted pieces send out fresh runners and close the gaps into a new lawn.
Conditions for Healthy Growth
Give this carpet strong light and added CO2 to keep it tight and low; in weaker light it grows leggier. Cooler water suits it better than tropical heat, so aim for the lower part of the temperature range. A fine, nutrient-bearing substrate helps the shallow fibrous roots anchor and the runners spread quickly.
Trimming & Maintenance
Trim the carpet regularly to keep it thin and prevent the lower layers from shading out and detaching. Cutting the surface flush with scissors both keeps the lawn compact and yields tops you can replant elsewhere as new propagation material.
Common Challenges
- Warm water stalls growth and can kill the mat, so heat is the main obstacle.
- Mislabelled stock (Monte Carlo sold as waterwort) confuses care expectations.
- Thick old mats lift off the substrate if not trimmed, so divide and re-anchor periodically.