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Is Common Duckweed a Good Plant for Altifrons Eartheater?

Reviewed by Guidarium Editorial DeskUpdated May 6, 2026
Not Recommended

Common Duckweed is not recommended for Altifrons Eartheater. The issue is practical, not cosmetic: altifrons Eartheater is likely to chew or tear this plant before it settles in.

Common Duckweed

Lemna minor

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PlacementFloating
LightLow
DifficultyBeginner
Size0.2 × 1 cm

Altifrons Eartheater

Geophagus altifrons

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TemperamentMostly Peaceful
FamilyCichlids - South American
Temp24–30°C
Water TypeFreshwater Only

Quick Decision

A plant can be technically compatible with a fish and still fail in the actual tank if the fish digs, chews, needs denser cover, or uses a different part of the layout.

Overall fit

58/100

The fish is likely to outgrow, uproot, or out-pressure the plant.

Water match

Workable overlap

Shared range: 24-30°C, pH 6-7.5, 1-10 dGH.

Plant pressure

High

Altifrons Eartheater may chew, uproot, or stress this plant.

Layout value

High cover

Common Duckweed helps with provides surface cover, good refuge for fry, good grazing surface, and good refuge for shrimp.

Plant and Fish Fit Notes

Use these signals to decide whether the plant is doing useful work for the fish, or whether it is only surviving beside it.

Temperature
Common Duckweed10-30°C
Altifrons Eartheater24-30°C

Overlap: 24-30°C.

pH
Common Duckweed6-8
Altifrons Eartheater5-7.5

Overlap: pH 6-7.5.

Hardness
Common Duckweed0-30 dGH
Altifrons Eartheater1-10 dGH

Overlap: 1-10 dGH.

Water and flow
Common DuckweedFreshwater Only, Low (Still Water)
Altifrons EartheaterFreshwater Only, Moderate (Standard)

Flow expectations are close enough for one layout.

Space used
Common DuckweedFloating
Altifrons EartheaterBottom (Substrate) and Middle (Open Water)
Pressure signals
Common DuckweedLow uproot resistance, Delicate leaves
Altifrons EartheaterMostly Peaceful, Digger (Disturbs Substrate), Plant Destroyer, and Hyperactive / Fast Swimmer

Plant pressure: High.

Planting value
Common DuckweedProvides surface cover, Good refuge for fry, Good grazing surface, and Good refuge for shrimp, No substrate required
Altifrons EartheaterSand (Sifters), Driftwood (Digestion/Hiding), and Smooth Gravel (Sensitive Barbels)

Shared Tank Conditions

Common Duckweed fits inside the water range normally used for Altifrons Eartheater. The shared window is about 24 to 30 °C, pH 6 to 7.5, and 1 to 10 dGH, which gives you enough room to aim for stable middle-ground conditions.

Their flow expectations are close enough to combine: Common Duckweed prefers gentle, low-flow water, while Altifrons Eartheater prefers moderate flow.

Both are suited to freshwater, so salinity does not add an extra planning problem.

Fish Pressure and Plant Resilience

Altifrons Eartheater puts heavy pressure on plants, so this species is likely to be chewed, uprooted, or stressed in day-to-day use.

Common Duckweed has high cover density, low uproot resistance, and delicate leaves. It can also help with surface cover, fry refuge, grazing surfaces, and shrimp refuge.

Its structure adds useful refuge value beyond the normal visual role of the plant.

The limiting issue is altifrons Eartheater is likely to chew or tear this plant before it settles in.

Layout Fit

Common Duckweed is a floating plant usually used floating.

Altifrons Eartheater is a South American cichlid, so the pairing works best when the planting style supports how that fish uses space and cover.

Common Duckweed reaches about 0.2 cm tall by 1 cm wide and is usually free-floating with no substrate required. That makes placement and anchoring more important than simply adding a larger bunch of stems or leaves.

In this pairing, the useful plant values are surface cover, fry refuge, grazing surfaces, and shrimp refuge. Place it where Altifrons Eartheater can actually use that structure instead of hiding the plant where it cannot do much.

Practical Recommendation

For most keepers, a tougher or better-matched plant is the smarter choice. If you still try it, test with a small amount first and be ready to move the plant before it is badly damaged.

The decision should center on this signal: Altifrons Eartheater is likely to chew or tear this plant before it settles in.

Best Use Case

Common Duckweed is usually the wrong plant for Altifrons Eartheater if your goal is a stable display tank. The issue is rarely one dramatic failure on day one; it is the steady mismatch between what the fish does in the scape and what the plant needs to stay attractive long term.

Frequently Asked Questions About Common Duckweed and Altifrons Eartheater

Is Common Duckweed a good plant for Altifrons Eartheater?

Common Duckweed is not recommended for Altifrons Eartheater. The issue is practical, not cosmetic: altifrons Eartheater is likely to chew or tear this plant before it settles in.

Can Altifrons Eartheater damage Common Duckweed?

Altifrons Eartheater is likely to chew or tear this plant before it settles in.

Do Common Duckweed and Altifrons Eartheater share the same water conditions?

Common Duckweed and Altifrons Eartheater share a workable water window around 24 to 30 °C, pH 6 to 7.5, and 1 to 10 dGH. Keep the tank near the middle of that overlap for the best long-term result.

What does Common Duckweed add to a tank with Altifrons Eartheater?

Its structure adds useful refuge value beyond the normal visual role of the plant.

What is the main risk in this plant and fish pairing?

Altifrons Eartheater is likely to chew or tear this plant before it settles in.

Editorial Review

Guidarium Editorial Desk

Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.

Last reviewed
May 6, 2026
Last updated
May 6, 2026
Issues or corrections?
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