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Is African Water Fern a Good Plant for Peacock Eel?

Reviewed by Guidarium Editorial DeskUpdated May 7, 2026
Not Recommended

African Water Fern is not recommended for Peacock Eel. The issue is practical, not cosmetic: the fish wants a very different current pattern than the plant prefers.

African Water Fern

Bolbitis heudelotii

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PlacementMidground
LightLow
DifficultyBeginner
Size40 × 25 cm

Peacock Eel

Macrognathus siamensis

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TemperamentPeaceful
FamilyOddballs
Temp23–28°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

80/100

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

Water match

Workable overlap

Shared range: 23-28°C, pH 6.5-7.5, 5-12 dGH.

Plant pressure

Low

Peacock Eel is not flagged as unusually hard on this plant.

Layout value

Moderate cover

African Water Fern helps with breaks lines of sight, good refuge for shrimp, and useful spawning site.

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
African Water Fern20-28°C
Peacock Eel23-28°C

Overlap: 23-28°C.

pH
African Water Fern6-7.5
Peacock Eel6.5-8

Overlap: pH 6.5-7.5.

Hardness
African Water Fern2-12 dGH
Peacock Eel5-15 dGH

Overlap: 5-12 dGH.

Water and flow
African Water FernFreshwater Only, High (River/Stream)
Peacock EelFreshwater Only, Low (Still Water)

Flow expectations point in different directions.

Space used
African Water FernMidground, Background, and Attached to hardscape
Peacock EelBottom (Substrate)
Pressure signals
African Water FernHigh uproot resistance, Tough / leathery leaves
Peacock EelPeaceful, Digger (Disturbs Substrate), Jumper (Lid Required), and Nocturnal

Plant pressure: Low.

Planting value
African Water FernBreaks lines of sight, Good refuge for shrimp, and Useful spawning site, No substrate required
Peacock EelSand (Sifters), Smooth Gravel (Sensitive Barbels), and Plants - Densely covered

Shared Tank Conditions

African Water Fern fits inside the water range normally used for Peacock Eel. The shared window is about 23 to 28 °C, pH 6.5 to 7.5, and 5 to 12 dGH, which gives you enough room to aim for stable middle-ground conditions.

Flow is another friction point because African Water Fern prefers strong, stream-style flow while Peacock Eel prefers gentle, low-flow water.

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

Fish Pressure and Plant Resilience

Peacock Eel does not put unusual pressure on this plant compared with harder fish-plant combinations.

African Water Fern has moderate cover density, high uproot resistance, and tough / leathery leaves. It can also help with breaking up sight lines, shrimp refuge, and spawning sites.

This plant adds the denser cover that Peacock Eel usually appreciates.

The limiting issue is the fish wants a very different current pattern than the plant prefers.

Layout Fit

African Water Fern is a rhizome / epiphyte plant usually used midground, background, and attached to hardscape.

Peacock Eel is an oddball fish, so the pairing works best when the planting style supports how that fish uses space and cover.

African Water Fern reaches about 40 cm tall by 25 cm wide and is usually attached / wedged to hardscape 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 line-of-sight breaks, shrimp refuge, and spawning sites. Place it where Peacock Eel 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: The fish wants a very different current pattern than the plant prefers.

Best Use Case

African Water Fern is usually the wrong plant for Peacock Eel 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 African Water Fern and Peacock Eel

Is African Water Fern a good plant for Peacock Eel?

African Water Fern is not recommended for Peacock Eel. The issue is practical, not cosmetic: the fish wants a very different current pattern than the plant prefers.

Can Peacock Eel damage African Water Fern?

The fish wants a very different current pattern than the plant prefers.

Do African Water Fern and Peacock Eel share the same water conditions?

African Water Fern and Peacock Eel share a workable water window around 23 to 28 °C, pH 6.5 to 7.5, and 5 to 12 dGH. Keep the tank near the middle of that overlap for the best long-term result.

What does African Water Fern add to a tank with Peacock Eel?

This plant adds the denser cover that Peacock Eel usually appreciates.

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

The fish wants a very different current pattern than the plant prefers.

Editorial Review

Guidarium Editorial Desk

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

Last reviewed
May 7, 2026
Last updated
May 7, 2026
Issues or corrections?
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