Myriophyllum 'Guyana' (Myriophyllum sp. 'Guyana') care guide

Group
Plants
Other names
Myriophyllum 'Guyana'
Family
Haloragaceae (water-milfoil family)
Origin
South America
Water
freshwater
Maximum size
30 cm
Temperature
20–28°C
pH
6–7.5
Hardness
2–12 dGH
Care level
intermediate
Lighting
Medium to high light; medium CO2 (about 6–14 mg/l)

Care

Myriophyllum sp. 'Guyana' is a South American water-milfoil that stays bright green even under very strong light. Individual stems are short, about 2–3 cm between branches, but branch freely into a dense, lush plant reaching roughly 10–30 cm. Tropica rates it medium difficulty, with medium light and CO2 needs and medium growth, which makes it suit nano tanks. Trim regularly to keep light and water flow reaching the inner stems. Water figures are our estimate, not from the sources. It is not one of the milfoils on the GB invasive species list (those are Myriophyllum aquaticum and M. heterophyllum), but as with all milfoils: Never release this plant or dispose of it in drains or waterways; it is invasive in some countries. Sources: Tropica (tropica.com/en/plants). Checked October 2026.

Breeding

Cut the tops or side branches and replant them. Tropica supplies it as tissue culture in cups.

Compatibility and tank mates

Fine foliage traps debris and is eaten by goldfish and some herbivores. Suits aquascapes with small fish and shrimp.

Last updated 8 October 2026. Community-edited care guide on Aquatic-Auctions.

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