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Is Amazon Sword a Good Plant for Peacock Eel?

Reviewed by Guidarium Editorial DeskUpdated May 7, 2026
Possible with Caution

Amazon Sword can work with Peacock Eel, but this is a possible with caution pairing. The plant may need a protected position, stronger anchoring, or companion plants before it feels reliable in day-to-day use. The match depends on anchoring and placement more than the water numbers alone.

Amazon Sword

Echinodorus amazonicus

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PlacementMidground
LightModerate
DifficultyBeginner
Size50 × 40 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

74/100

Possible, but the scape needs more care.

Water match

Workable overlap

Shared range: 23-28°C, pH 6.5-7.5, 5-15 dGH.

Plant pressure

Moderate

Amazon Sword needs thoughtful placement and anchoring.

Layout value

Moderate cover

Amazon Sword helps with breaks lines of sight 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
Amazon Sword22-28°C
Peacock Eel23-28°C

Overlap: 23-28°C.

pH
Amazon Sword6-7.5
Peacock Eel6.5-8

Overlap: pH 6.5-7.5.

Hardness
Amazon Sword2-15 dGH
Peacock Eel5-15 dGH

Overlap: 5-15 dGH.

Water and flow
Amazon SwordFreshwater Only, Moderate (Standard)
Peacock EelFreshwater Only, Low (Still Water)

Flow expectations are close enough for one layout.

Space used
Amazon SwordMidground and Background
Peacock EelBottom (Substrate)
Pressure signals
Amazon SwordHigh uproot resistance, Standard leaves
Peacock EelPeaceful, Digger (Disturbs Substrate), Jumper (Lid Required), and Nocturnal

Plant pressure: Moderate.

Planting value
Amazon SwordBreaks lines of sight and Useful spawning site, Nutrient-rich substrate preferred
Peacock EelSand (Sifters), Smooth Gravel (Sensitive Barbels), and Plants - Densely covered

Shared Tank Conditions

Amazon Sword 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 15 dGH, which gives you enough room to aim for stable middle-ground conditions.

Their flow expectations are close enough to combine: Amazon Sword prefers moderate 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 can still be rough on plants, but this pairing becomes more realistic when the plant is anchored well and used as part of a larger layout.

Amazon Sword has moderate cover density, high uproot resistance, and standard leaves. It can also help with breaking up sight lines and spawning sites.

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

The point to watch is substrate activity from the fish means this planting style needs extra anchoring at first.

Layout Fit

Amazon Sword is a rosette / crown plant usually used midground and background.

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

Amazon Sword reaches about 50 cm tall by 40 cm wide and is usually rooted in substrate with nutrient-rich substrate preferred. 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 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

Treat this as a managed pairing. Plant it securely, give it time to root or attach, and use other plants or hardscape if the fish needs more shelter than one species can provide.

The decision should center on this signal: Substrate activity from the fish means this planting style needs extra anchoring at first.

Best Use Case

Amazon Sword can work with Peacock Eel, but only if you are honest about the pressure the fish puts on the layout. This is the kind of pairing that succeeds when the plant is chosen for a reason, protected by placement, and supported by a maintenance routine that anticipates damage or crowding.

Frequently Asked Questions About Amazon Sword and Peacock Eel

Is Amazon Sword a good plant for Peacock Eel?

Amazon Sword can work with Peacock Eel, but this is a possible with caution pairing. The plant may need a protected position, stronger anchoring, or companion plants before it feels reliable in day-to-day use. The match depends on anchoring and placement more than the water numbers alone.

Can Peacock Eel damage Amazon Sword?

Substrate activity from the fish means this planting style needs extra anchoring at first.

Do Amazon Sword and Peacock Eel share the same water conditions?

Amazon Sword and Peacock Eel share a workable water window around 23 to 28 °C, pH 6.5 to 7.5, and 5 to 15 dGH. Keep the tank near the middle of that overlap for the best long-term result.

What does Amazon Sword 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?

Substrate activity from the fish means this planting style needs extra anchoring at first.

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
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