DIFFICULTY Moderate

Benefits from more deliberate care.

LIGHT High

Around 10 hours is a useful starting point.

CO₂ Recommended

Can grow without it, but responds noticeably to supplementation.

GROWTH Medium

Weekly trimming needs.

PLANT OVERVIEW

About Pearlweed (Micranthemum)

A tiny-leaved carpeting Micranthemum for bright foregrounds.

This small Micranthemum forms a fresh green carpet of tiny round leaves, pearling with oxygen under CO2 and strong light. It's a versatile foreground plant that can also drape over hardscape, filling in between larger features.
Shrimp friendly Nano suitable High-tech suitable Fry cover
CARE PROFILE

What this plant needs.

The useful numbers and practical notes, grouped around how you actually keep the plant.

TANK FIT

Placement + size

Primary placementForeground
Typical height1–3 in
Typical width3 in
Suggested minimum tank10 gal
Suggested tank height12 in+
LIGHT + CO₂

Energy demand

Ideal lightHigh
Photoperiod range8–12 hr
Approx. PAR40–100
Injected CO₂Recommended
CO₂ benefitHigh
NUTRITION

Where it feeds

Root feedingLow
Water-column feedingModerate
Overall fertilizer demandModerate
Iron demandModerate
MicronutrientsModerate
WATER

Useful parameter range

Temperature70–82°F
pH5.5–7.2
GH1–12 dGH
KH0–8 dKH
PLANTING

How to plant it.

Substrate: Nutrient-rich substrate

Plant small tufts; carpets faster with CO2 and good light.

GROWTH + PROPAGATION

What to expect after planting.

Propagation

Stem cuttings

Acclimation

Colors up as it converts to submersed growth under good light.

COMMON PROBLEMS

What usually goes wrong.

Stays green and leggy in low light; needs iron and light for red tones.