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Hydrocotyle Japan
Hydrocotyle sp. 'Japan'
Plantae›Tracheophyta›Magnoliopsida›Araliaceae
📍 Japan
A compact variant of pennywort that produces small, neatly round, bright green leaves on short stems. Unlike the faster-growing H. tripartita, it has a more controlled growth habit and can be used as a delicate foreground or mid-ground filler. It adapts readily to CO2 and non-CO2 tanks alike.
Tank Mates
Gentle algae grazers that won't uproot or damage delicate foliage
Small, peaceful shrimp that benefit from plant cover and won't harm the plant
Peaceful bottom-dwellers that help control algae without damaging plants
Tiny, non-aggressive fish that thrive in planted tanks with similar water parameters
Excellent companion plant with similar low-light tolerance and slow growth rate
Compatible foreground/midground plant that creates lush, natural aquascaping with Hydrocotyle Japan
Common Diseases
Nutrient Deficiency (Iron/Macronutrient)
Yellowing or pale leaves, stunted growth, loss of vibrant green coloration
Increase fertilizer dosing with all-in-one or macro/micro fertilizer blends; ensure adequate lighting to support photosynthesis
Algae Overgrowth (Green/Brown Algae)
Visible algae coating on leaves, reduced light penetration, plant appears smothered
Increase water changes, reduce light duration to 6-8 hours daily, add algae-eating shrimp or fish, manually remove affected leaves
Melting (Tissue Decay)
Leaves become translucent, mushy, or dissolve; typically occurs after major parameter changes
Maintain stable water parameters (pH 6.0-7.5, temperature 18-26°C), perform gradual acclimation, increase water circulation and reduce organic waste
Root Rot (in Substrate)
Stems become soft and blackened at base, poor growth despite adequate light and fertilization
Improve substrate drainage, increase water circulation, remove affected portions, ensure root tabs are not compacted or anaerobic
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Quick Facts
- co2
- Optional
- light
- Low–High
- placement
- Foreground–Midground
- tank size
- 5 gallons minimum
- growth rate
- Moderate
Water it likes
- ph
- 6.0–7.5
- hardness
- 2–15 dGH
- temperature
- 64–79°F (18–26°C)
Stats
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