Lysimachia nummularia (Creeping Jenny or Moneywort)

1. Tank Setup

• Tank Size: Can thrive in both small and large tanks; no strict minimum, but 20 liters or more is ideal if used as a carpet or midground plant.

• Substrate: Nutrient-rich substrate preferred (like ADA Aqua Soil, Fluval Stratum, or Seachem Flourite), but it can also root in gravel with root tabs.

2. Light

• Requirement: Medium to high lighting is ideal for healthy growth. Low light may cause leggy growth and yellowing leaves.

• Duration: 8–10 hours per day.

3. Water Parameters

• Temperature: 18–28°C (64–82°F)

• pH: 6.0–7.5

• Hardness: Soft to moderately hard water (2–15 dGH)

• Flow: Low to moderate water flow is fine; high flow may encourage denser growth but can also trim delicate stems.

4. Planting & Growth

• Method: Can be planted as a foreground/midground carpeting plant or allowed to trail from floating sections.

• Spacing: Plant 2–3 cm apart if carpeting; if trailing, no need for spacing.

• Propagation: Easy via stem cuttings. Cut the top healthy portion and replant; new roots will grow from nodes.

• Growth Rate: Fast under good light and nutrients. May grow up to the water surface if not trimmed.

5. Fertilization & CO₂

• Fertilization: Benefits from liquid fertilizers containing potassium, iron, and micronutrients. Root tabs help if planted in substrate.

• CO₂: Optional but promotes faster and denser growth. Without CO₂, growth is slower but manageable.

6. Pruning & Maintenance

• Regular trimming is needed to prevent overcrowding and ensure bushy growth.

• Floating stems can be trimmed and re-planted to encourage spreading.

• Remove decaying leaves to prevent water quality issues.

7. Compatibility

• Safe for most community tanks.

• Fast-growing stems can be eaten by herbivorous fish like goldfish or some cichlids.

8. Interesting Fact

• Lysimachia nummularia is often used in aquascaping as a carpeting or trailing plant. Its bright green, round leaves resemble small coins, which is why it’s nicknamed “Moneywort.”