Mini Pellia

Mini Pellia (Riccardia chamedryfolia) is a tiny liverwort prized in the aquarium hobby for its exquisitely fine-textured, multi-branched thallus. Unlike the broad, flat lobes of Monosolenium tenerum, Riccardia chamedryfolia grows as densely forked, finger-like branches just a few millimeters wide, forming compact, deep-green cushions with a mossy but uniquely structural appearance. Native to Asia, it has become a staple in nano aquariums, Taiwan-style shrimp tanks, and high-clarity planted setups. Its minute scale makes it particularly effective for creating proportionally correct scale illusions in miniature landscapes. Mini Pellia grows more slowly than most mosses and requires reasonably stable, clean water to thrive. CO2 supplementation and adequate micronutrient availability significantly improve both growth rate and the density of branching. Without CO2, growth is very slow and the plant may become sparse under suboptimal conditions. It attaches to surfaces more readily than standard Pellia, making it easier to secure to small rocks, twigs, and mesh. Shrimp, especially dwarf Neocaridina and Caridina species, are extremely fond of grazing the biofilm that accumulates in its micro-textured lobes, making it a functional and aesthetic addition to shrimp-focused tanks. Algae, particularly hair algae, can become a persistent issue if light is too strong or nutrients are unbalanced.

Placement and Attachment Glue small portions to pebbles, twigs, or mesh using gel cyanoacrylate. Mini Pellia is relatively easy to attach compared to standard Pellia and holds position well once established. Use in foreground or as rock/wood accent.

Lighting Low to moderate light (15–25 µmol/m²/s PAR) is best. Avoid intense light that accelerates algae growth before the slow-growing liverwort establishes coverage.

CO2 and Fertilization CO2 injection is strongly recommended — without it, growth is minimal. Dose trace elements and micronutrients weekly using a dilute all-in-one fertilizer. Keep nitrates low (under 10 ppm) for best results in shrimp tanks.

Water Conditions Prefers pH 5.5–7.5, temperature 15–26°C. Soft to moderately hard water is fine. Pristine, well-filtered water is important — Mini Pellia is sensitive to organics buildup.

Pruning and Maintenance Minimal pruning; trim outer lobes if growth becomes too thick. Remove any brown or decaying material. Gentle siphoning around the plant keeps debris from settling in branching lobes.

Propagation Detach and re-glue small sections. Growth is slow so propagating large quantities takes time.

Common Issues Hair algae infiltrating the branching lobes is the most common problem and very difficult to remove. Prevention through balanced nutrients and stable CO2 is essential.