Brazilian Pennywort Care Guide

Brazilian pennywort is a fast-growing freshwater aquarium plant with round, bright green leaves. It can be planted in the substrate, wrapped around aquarium decorations, or allowed to float near the surface.

This versatile plant is a good choice for beginners because it adapts to different aquarium conditions and does not require injected carbon dioxide. Its leaves and trailing stems provide shelter for fish, shrimp, and fry.

Brazilian pennywort grows quickly when it receives sufficient light and nutrients. Regular trimming prevents it from covering the surface, shading other plants, or becoming tangled around aquarium equipment.

Brazilian Pennywort at a Glance

Scientific name: Hydrocotyle leucocephala
Common name: Brazilian pennywort
Difficulty: Easy
Growth rate: Fast
Maximum length: Approximately 12–24 inches or longer
Recommended tank size: 10 gallons or larger
Temperature: Approximately 68–82°F
pH: Approximately 6.0–8.0
Lighting: Low to moderate
Substrate: Optional
CO2: Not required
Placement: Middle area, background or floating
Propagation: Stem cuttings
Suitable for beginners: Yes

What Is Brazilian Pennywort?

Brazilian pennywort is a freshwater stem plant native to parts of Central and South America.

It produces thin stems with round or kidney-shaped leaves. The leaves grow on individual stalks extending outward from the main stem.

Small white roots may develop from the stem at the points where the leaves grow. These roots absorb nutrients from the water and may attach themselves to the substrate or nearby decorations.

Brazilian pennywort can grow underwater, float along the surface, or extend some of its leaves above the water in humid conditions.

Is Brazilian Pennywort Good for Beginners?

Brazilian pennywort is an excellent beginner aquarium plant because it is adaptable and easy to propagate.

It does not require:

Injected carbon dioxide
Nutrient-rich plant substrate
Very strong lighting
Complicated planting methods
Advanced aquarium plant experience

It can be grown as a rooted stem plant or left floating. If it does not grow well in one position, beginners can try moving it closer to the light or allowing it to float.

Its main care requirement is regular trimming. Healthy Brazilian pennywort can grow quickly and spread across the aquarium’s surface.

Aquarium Size

Brazilian pennywort can be grown in a 10-gallon aquarium, but frequent trimming may be necessary.

A 20-gallon or larger aquarium provides more space for its trailing stems and round leaves.

In a smaller tank, keep only a few stems and trim them before they cover the surface. In a larger aquarium, several stems can form a green background or grow around driftwood.

Leave open areas for fish to swim and feed. Do not allow floating growth to cover the entire water surface.

Water Parameters

Brazilian pennywort adapts to a wide range of freshwater conditions.

Recommended conditions include:

Temperature: Approximately 68–82°F
pH: Approximately 6.0–8.0
Water hardness: Soft to moderately hard
Water movement: Gentle to moderate

Stable water conditions are more important than reaching one exact pH or temperature.

Sudden changes in temperature, pH, or hardness may cause stress and leaf loss.

Always treat tap water with an aquarium water conditioner. Untreated chlorine and chloramine can harm plants, fish, and beneficial bacteria.

Lighting Requirements

Brazilian pennywort grows under low to moderate aquarium lighting.

Moderate light normally produces faster and fuller growth. Under weak light, the plant may become thin and develop larger spaces between its leaves.

Floating stems receive more light because they grow close to the aquarium fixture.

Begin with approximately six to eight hours of light each day. Use an automatic timer to provide a consistent schedule.

Leaving the aquarium light on too long can encourage algae. Make lighting changes gradually while observing the plant and the rest of the tank.

Does Brazilian Pennywort Need Substrate?

Brazilian pennywort does not require substrate because it absorbs nutrients through its stems, leaves, and roots.

It can grow in aquariums containing:

Gravel
Sand
Aquarium plant substrate
Bare bottoms

If planted, the lower section of the stem can be placed into the substrate. Small roots will develop and help anchor it.

The plant can also be left floating, making it useful in bare-bottom breeding or grow-out aquariums.

How to Plant Brazilian Pennywort

Brazilian pennywort is often sold as a bunch of stems held together by a band or plant weight.

Separate the stems before planting.

Follow these steps:

Remove the band or plant weight.
Separate the individual stems gently.
Rinse them in clean, conditioned water.
Remove damaged or decaying leaves.
Trim crushed sections from the stem bottoms.
Remove leaves from the lowest inch.
Insert the bare part into the substrate.
Space the stems one or two inches apart.

Do not bury healthy leaves. They may decay beneath the substrate.

If a stem floats loose, plant it slightly deeper or use a loose aquarium-safe plant weight temporarily. Do not crush the stem.

Can Brazilian Pennywort Float?

Brazilian pennywort grows very well while floating.

Place healthy stems on the water’s surface with the leaves facing the light. Small roots will hang into the water.

Floating Brazilian pennywort provides cover for:

Guppy fry
Molly fry
Bettas
Gouramis
Shrimp
Shy fish
Newly hatched fish

Do not allow the plant to cover the entire surface. Leave open areas for feeding, light penetration, gas exchange, and surface-breathing fish.

Floating growth may need trimming more frequently because it receives strong light.

Can Brazilian Pennywort Grow Above Water?

Brazilian pennywort may grow above the surface when the aquarium is humid and the stems reach open air.

Above-water growth may produce firmer leaves and occasionally small flowers.

Keep the plant away from hot aquarium lights and make sure exposed growth does not dry out.

If the aquarium has a lid, leave enough room so the leaves are not crushed against it.

Do not leave the tank uncovered if the fish may jump.

Does Brazilian Pennywort Need Fertilizer?

Brazilian pennywort absorbs nutrients from the aquarium water. Fish waste may provide some of what it needs in an established aquarium.

A complete liquid freshwater aquarium fertilizer can support healthier leaves and faster growth.

Follow the manufacturer’s directions carefully. Root tabs may help planted specimens but are often unnecessary because the plant feeds efficiently from the water column.

Do not overdose fertilizer. Excess nutrients can encourage algae and may harm sensitive aquarium inhabitants.

Does Brazilian Pennywort Need CO2?

Brazilian pennywort does not require injected carbon dioxide. It normally grows successfully in a low-tech aquarium.

Added CO2 may increase its growth rate, but most beginners will not need a CO2 system.

Stable water conditions, suitable lighting, and sufficient nutrients are normally enough.

How to Trim Brazilian Pennywort

Brazilian pennywort grows from the ends of its stems and may require trimming every one or two weeks.

Use clean aquarium scissors to cut long stems just above a healthy leaf joint.

The lower planted section may produce new side shoots after trimming. This can create fuller growth.

Remove leaves that are:

Yellow
Brown
Transparent
Damaged
Covered heavily with algae
Beginning to decay

Healthy upper cuttings can be replanted or allowed to float.

Collect all loose pieces so they do not clog the filter or decay in the aquarium.

How to Propagate Brazilian Pennywort

Brazilian pennywort is easily propagated from stem cuttings.

Follow these steps:

Select a healthy stem.
Cut off a section approximately four to six inches long.
Make sure the cutting has several healthy leaves.
Remove the leaves from the lowest inch.
Insert the bare stem into the substrate or let it float.
Provide stable lighting and water conditions.

The cutting should continue growing and produce new roots.

Replanting several healthy tops near the original stems can create a thicker group.

Benefits of Brazilian Pennywort

Brazilian pennywort provides several benefits in a freshwater aquarium.

Flexible Placement

It can be planted, floated, wrapped loosely around decorations, or allowed to grow near the surface.

Shelter for Fish

Its leaves and stems provide cover for shy fish and small aquarium inhabitants.

Hiding Places for Fry

Floating growth and hanging roots create useful shelter for fry.

Cover for Shrimp

Shrimp may search the stems, roots, and leaves for biofilm and tiny food particles.

Nutrient Absorption

Fast-growing Brazilian pennywort absorbs nutrients from the water.

Removing trimmings takes some of those stored nutrients out of the aquarium. However, it does not replace filtration, water changes, or water testing.

Natural Appearance

Its round green leaves create an attractive contrast with narrow-leaved aquarium plants.

Easy Propagation

New plants can be produced from stem cuttings without special equipment.

Suitable Tank Mates

Brazilian pennywort can be kept with many peaceful freshwater aquarium inhabitants, including:

Tetras
Rasboras
Guppies
Mollies
Platies
Swordtails
Danios
Corydoras
Bettas
Gouramis
Angelfish
Freshwater shrimp
Aquarium snails

Bettas and gouramis may appreciate floating cover, but they need open areas where they can reach the surface.

Goldfish may nibble or tear the leaves. Large cichlids and fish that dig may uproot planted stems.

Common Brazilian Pennywort Problems

Yellow Leaves

Yellow leaves may result from insufficient nutrients, weak lighting, damaged stems, or unstable water conditions.

Remove yellow growth and check the aquarium’s lighting and water parameters.

A properly dosed complete liquid fertilizer may help if nutrients are insufficient.

Brown or Transparent Leaves

Brown or transparent leaves are usually dying.

Remove them before they decay. Check for sudden water changes, physical damage, or a stem buried too deeply.

Lower Leaves Falling Off

Lower leaves may fall when they receive too little light.

Space planted stems apart and trim crowded upper growth. Floating the plant may help if the aquarium light is weak.

Tall, Thin Growth

Long spaces between the leaves can indicate inadequate lighting.

Gradually improve the lighting if the current fixture is too weak. Do not suddenly increase the intensity or leave the light on all day.

Stem Rot Near the Substrate

A crushed or deeply buried stem may begin to rot.

Cut away the soft section and replant the healthy upper growth. Remove leaves from the portion placed beneath the substrate.

Plant Floating Loose

Brazilian pennywort may not remain planted until it develops roots.

Plant the bare lower section slightly deeper or use an aquarium-safe plant weight temporarily.

You can also allow it to float permanently.

Excessive Growth

Healthy Brazilian pennywort may cover the surface and shade plants below.

Trim it regularly and remove excess stems. Keep part of the surface open.

Algae on the Leaves

Algae may grow when the aquarium receives too much light or contains excess nutrients.

Avoid overfeeding, keep the lighting schedule consistent, use fertilizer carefully, and continue regular partial water changes.

Remove heavily affected leaves.

Roots Growing From the Stem

Small white roots growing from the leaf joints are normal. The plant uses them to absorb nutrients and anchor itself.

You can leave the roots in place or trim excessively long ones carefully.

Is Brazilian Pennywort Safe for Shrimp?

Brazilian pennywort is generally suitable for freshwater shrimp.

Its stems, leaves, and roots provide shelter and surfaces where shrimp can search for biofilm.

Rinse and inspect new plants carefully. Plants from unknown sources may have been exposed to pesticides that can harm shrimp.

Use aquarium fertilizer only as directed.

Does Brazilian Pennywort Help Control Nitrate?

Fast-growing Brazilian pennywort uses nitrogen compounds and other nutrients from the aquarium water.

Healthy growth may help absorb some nitrate, especially when excess plant material is trimmed and removed.

Continue testing ammonia, nitrite, and nitrate and performing regular partial water changes. The plant cannot replace good aquarium maintenance.

Does Brazilian Pennywort Provide Oxygen?

Brazilian pennywort releases oxygen during photosynthesis when its underwater leaves receive sufficient light.

Plants also consume oxygen when the aquarium lights are off. Brazilian pennywort cannot replace proper filtration, water circulation, or aeration.

Brazilian Pennywort Care Tips

For healthy Brazilian pennywort:

Provide approximately six to eight hours of light.
Plant individual stems separately.
Remove leaves from the buried part of each stem.
Let the plant float if planting is unsuccessful.
Use liquid fertilizer only as directed.
Trim long stems regularly.
Replant healthy top cuttings.
Keep part of the surface open.
Remove damaged or decaying leaves.
Never release aquarium plants into natural waterways.

Is Brazilian Pennywort Right for Your Aquarium?

Brazilian pennywort is an excellent choice for beginners who want a fast-growing and versatile aquarium plant.

It can be planted or floated, does not require injected CO2, and is easy to propagate. Its round green leaves provide a different appearance from grass-like or finely divided plants.

The main challenge is controlling its rapid growth. Regular trimming prevents it from covering the surface or shading other plants.

Final Thoughts

Brazilian pennywort is an adaptable freshwater plant that can be used in several parts of an aquarium.

Plant it in the substrate for a tall background, allow it to trail around decorations, or float it to provide cover for fish and fry.

Give it stable water conditions, consistent lighting, and regular trimming. With basic care, Brazilian pennywort can grow quickly and add attractive round leaves to a beginner aquarium.