Aquariumbackground plant · easy
Ludwigia repens 'Rubin': height, light, CO₂ & fish that eat it
Ludwigia repens 'Rubin' typically grows 7.9–12 in tall (20–30 cm) and grows in the background of a tank. It's rated for medium–high light, and injected CO₂ is not needed. Temperature 43–90°F, pH 5–7.5.
How tall it grows
Each bar is roughly the water depth a tank leaves above the substrate. The teal band is the plant's reported height range. ✓ fits, trim means it can reach the surface, ✕ means it typically outgrows the water.
Will it fit your tank?
Quick facts
- Grows to
- 7.9–12 in (20–30 cm)
- Height basis
- Tropica 2-month avg (20-30+); Tropica text stems 20-50
- Where it goes
- midground, background
- Light
- medium–high light
- Injected CO₂
- not needed
- Growth
- medium–fast
- Difficulty
- easy
- Temperature
- 43–90°F
- pH
- 5–7.5
- Hardness
- 0–30 dGH
- Feeds through
- not published
- Also sold as
- Ludwigia 'Rubin'; Ludwigia sp. 'Weinrot'; Ludwigia aff. glandulosa
Planting tip: Plant in groups and prune regularly for bushy growth; strong light and iron deepen the red.
Fish and Ludwigia repens 'Rubin'
Checked with the same rules as our tank builder: plant-eating and digging named in each fish's sources, plus temperature and pH overlap.
Eats it (9)
- Convict CichlidFlagged as eating live plants
- Common PlecoFlagged as eating live plants
- Common / Comet GoldfishFlagged as eating live plants
- Clown LoachIts sources suggest java fern, java moss, anubias instead
- Tinfoil BarbFlagged as eating live plants
- Buenos Aires TetraFlagged as eating live plants
- Kissing GouramiIts sources suggest anubias, java fern instead
- Yoyo LoachIts sources suggest java fern, java moss, anubias instead
- Fancy GoldfishIts sources suggest anubias, java fern instead
May uproot it (6)
Different water (2)
Fish that leave it alone and share its water (93)
Common questions
How tall does Ludwigia repens 'Rubin' grow?
Growers report about 7.9–12 in (20–30 cm). Basis: Tropica 2-month avg (20-30+); Tropica text stems 20-50.
How much light does Ludwigia repens 'Rubin' need?
It's rated for medium–high light. Growers often disagree on light, so this is the full range across our sources.
Does Ludwigia repens 'Rubin' need CO₂?
No. Its sources rate its CO₂ need as low, and it grows without injection.
Which fish eat Ludwigia repens 'Rubin'?
In our database, Convict Cichlid, Common Pleco, Common / Comet Goldfish, Clown Loach, Tinfoil Barb, Buenos Aires Tetra, Kissing Gourami, Yoyo Loach, Fancy Goldfish are flagged as eating live plants. Tough-leaved anubias usually hold up better.
Gear for Ludwigia repens 'Rubin'
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Related guides
Sources
Values come from these pages, in our own words. Where growers disagree, we show the full range. Last reviewed 2026-10-17.
- tropica.com /en/plants/plantdetails/4450/4450
- aquasabi.com /Ludwigia-Rubin
- flowgrow.de /db/aquaticplants/ludwigia-rubin
- flowgrow.de /db/aquaticplants/ludwigia-repens-rubin