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Is Tonina a Good Plant for Peacock Eel?

Reviewed by Guidarium Editorial DeskUpdated May 7, 2026
Not Recommended

Tonina is not recommended for Peacock Eel. The issue is practical, not cosmetic: peacock Eel is likely to uproot this plant while digging through the substrate.

Tonina

Tonina fluviatilis

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PlacementMidground
LightHigh
DifficultyAdvanced
Size30 × 5 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

58/100

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

Water match

Workable overlap

Shared range: 23-28°C, pH 6.5-6.8, 5-5 dGH.

Plant pressure

High

Peacock Eel may chew, uproot, or stress this plant.

Layout value

Moderate cover

Tonina helps with breaks lines of sight 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
Tonina20-30°C
Peacock Eel23-28°C

Overlap: 23-28°C.

pH
Tonina5-6.8
Peacock Eel6.5-8

Overlap: pH 6.5-6.8.

Hardness
Tonina0-5 dGH
Peacock Eel5-15 dGH

Overlap: 5-5 dGH.

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

Flow expectations are close enough for one layout.

Space used
ToninaMidground and Background
Peacock EelBottom (Substrate)
Pressure signals
ToninaLow uproot resistance, Delicate leaves
Peacock EelPeaceful, Digger (Disturbs Substrate), Jumper (Lid Required), and Nocturnal

Plant pressure: High.

Planting value
ToninaBreaks lines of sight and Good refuge for shrimp, Nutrient-rich substrate preferred
Peacock EelSand (Sifters), Smooth Gravel (Sensitive Barbels), and Plants - Densely covered

Shared Tank Conditions

Tonina fits inside the water range normally used for Peacock Eel. The shared window is about 23 to 28 °C, pH 6.5 to 6.8, and 5 to 5 dGH, which gives you enough room to aim for stable middle-ground conditions.

Their flow expectations are close enough to combine: Tonina 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 puts heavy pressure on plants, so this species is likely to be chewed, uprooted, or stressed in day-to-day use.

Tonina has moderate cover density, low uproot resistance, and delicate leaves. It can also help with breaking up sight lines and shrimp refuge.

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

The limiting issue is peacock Eel is likely to uproot this plant while digging through the substrate.

Layout Fit

Tonina is a stem 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.

Tonina reaches about 30 cm tall by 5 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 shrimp refuge. 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: Peacock Eel is likely to uproot this plant while digging through the substrate.

Best Use Case

Tonina 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 Tonina and Peacock Eel

Is Tonina a good plant for Peacock Eel?

Tonina is not recommended for Peacock Eel. The issue is practical, not cosmetic: peacock Eel is likely to uproot this plant while digging through the substrate.

Can Peacock Eel damage Tonina?

Peacock Eel is likely to uproot this plant while digging through the substrate.

Do Tonina and Peacock Eel share the same water conditions?

Tonina and Peacock Eel share a workable water window around 23 to 28 °C, pH 6.5 to 6.8, and 5 to 5 dGH. Keep the tank near the middle of that overlap for the best long-term result.

What does Tonina 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?

Peacock Eel is likely to uproot this plant while digging through the substrate.

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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