Water milfoil: an oxygenating, cleansing, and decorative plant for natural aquariums and ponds
What is Water milfoil?
Water milfoil (Myriophyllum brasiliensis) is an aquatic plant with reddish stems covered in finely cut leaves forming a soft green lace (which can turn coppery red under strong light). It grows both planted and floating, anchors to the bottom with long filaments, and tolerates indoor and outdoor environments, from low-tech aquariums to ponds.
Why choose Water milfoil for a natural aquarium or pond?
- Powerful oxygenating action: submerged, it improves dissolved oxygen levels for fish and invertebrates.
- Natural filtration: submerged or emerged, it quickly absorbs nitrates and phosphates, slowing algae growth. Ideal for low-tech setups.
- Refuge for fry: foliage and tangled stem network appreciated by fry and shy fish.
- Ultra-versatile: thrives even without substrate or CO₂, compatible with low-tech aquariums, ponds, and trash ponds.
- Unique aesthetic: creates a feathery "forest" underwater or soft green foliage above water.
- Resistant: in ponds, it easily withstands goldfish and koi carp.
Water milfoil care
- ✂️ Fast growth: trim, pinch, or bend the stems to control height and prevent thinning.
- 🌡️ Temperature: 3 - 30 °C (perfectly survives winter in a pond).
- 💡 Light: moderate to strong. The color becomes redder with intense lighting.
- 🌱 Quick cutting: a single fragment is enough to create a new plant.
- 🔗 Fixation: anchor the stems in sand or decor, or simply let them float; the plants will anchor themselves with their "root" filaments (false roots).
Tips for using Water milfoil well
- 🌿 Place it in the background or create a jungle of tangled stems.
- 🎨 Pair it with plants with broader leaves for visual contrast.
- 🔧 Use it as a living filter in tanks without pumps and in ponds.
- 🌞 Perfect in open tanks: the emerged stems, with their different leaves, create an airy herbarium of a beautiful soft green and slightly shade the entire tank.
- 🦐 Combine it with microfauna (water lice, planorbids...) for an active ecosystem.
Water milfoil FAQ for aquarium or pond
Is water milfoil floating?
It can float freely or anchor itself by sending out "root" filaments to the bottom.
Is it suitable for low tech aquariums?
Yes. It only requires adequate lighting and regular trimming. No heating, filtration, or technical soil needed.
Does it need substrate?
No. It absorbs nutrients only through its leaves and anchors itself just to resist the current.
How to prune it?
Cut back stems that are too long and bare, replant the tips to thicken the clump.
Can I use it in a trashcan garden?
Absolutely; it tolerates temperature variations and overwinters outdoors.
Additional information
Scientific name: Water milfoil brasiliensis
Adult height: 15 - 50 cm (stem length) and up to 2 m in large ponds
Packaging: set of 3 started cuttings (approximate weight: 20 g)
Guarantee: without rock wool or artificial substrate
Recommendation: even if not classified as invasive, please never release the plant into the wild
