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Plant Freshwater Care: hard

Cabomba Aquatica

Cabomba aquatica
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Other names: Giant cabomba, Yellow fanwort, Yellow cabomba
Group: Stem plants · Family: Cabombaceae · Origin: South America — Amazon basin and the Guianas

A very elegant, light green stem plant that forms the finest and widest leaf fans of all cabomba species. It needs warm, soft water, strong light and CO₂; it can produce small yellow flowers at the surface.

Last updated October 16, 2026

Temperature
24–30°C
pH
5–7
Hardness
1–6 dGH
Light
High
CO₂
Required
Growth
Fast
Placement
Background
Height
Up to 60 cm

Water parameters

Temperature24–30°C
pH5–7
General hardness (GH)1–6 dGH
Recommended range

Overview

October 16, 2026 · Suggest an edit

Cabomba aquatica is a cabomba from the warm, soft waters of the Amazon basin. Its leaves are much more finely divided and wider than those of green cabomba (C. caroliniana); each leaf pair forms a light green, lacy, round fan. When the stems reach the surface, it can produce small floating leaves and yellow flowers, whereas the flowers of other cabombas are white or purple. Despite its beauty, it is demanding: without warm, soft water, strong light, CO₂ and regular iron, it drops its lower leaves and falls apart.

Do not release it into the wild: Cabomba species can become invasive when they get into natural waters; trimmings should go in the trash.

Planting and Placement

October 16, 2026 · Suggest an edit
  • Stems are planted one by one with 4–5 cm between them, held gently with tweezers and buried 3–4 cm deep.
  • It is placed in the background, in a spot that gets direct light and where the current is not strong.

Care and Fertilization

October 16, 2026 · Suggest an edit
  • Light: High.
  • CO₂: Required.
  • Water: Very soft (GH 1–6), acidic, warm water.
  • Fertilizer: Regular iron and micronutrient supplementation.
  • Trimming: Cut from the top and replanted; good filtration is needed so that debris does not cling to the fine leaves.

Propagation

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Common Problems

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Hobbyist notes

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Things you won't find in books, learned by trial and error. The most helpful ones are on top.

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Change history and contributors
  1. Page created · October 16, 2026