Back to Undulata fish guides

Is Undulata a Good Plant for Brown Hoplo Catfish?

Reviewed by Guidarium Editorial DeskUpdated May 6, 2026
Possible with Caution

Undulata can work with Brown Hoplo Catfish, 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. Fish pressure is the main concern, so the plant needs protection or a tougher substitute.

Undulata

Cryptocoryne undulata

View plant profile
PlacementMidground
LightLow
DifficultyBeginner
Size25 × 20 cm

Brown Hoplo Catfish

Hoplosternum littorale

View fish profile
TemperamentPeaceful
FamilyCatfish
Temp18–28°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

68/100

Possible, but the scape needs more care.

Water match

Workable overlap

Shared range: 20-28°C, pH 6-8, 4-15 dGH.

Plant pressure

High

Brown Hoplo Catfish may chew, uproot, or stress this plant.

Layout value

Moderate cover

Undulata helps with breaks lines of sight, good refuge for shrimp, and good grazing surface.

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
Undulata20-28°C
Brown Hoplo Catfish18-28°C

Overlap: 20-28°C.

pH
Undulata6-8
Brown Hoplo Catfish6-8

Overlap: pH 6-8.

Hardness
Undulata2-15 dGH
Brown Hoplo Catfish4-20 dGH

Overlap: 4-15 dGH.

Water and flow
UndulataFreshwater Only, Low (Still Water)
Brown Hoplo CatfishFreshwater Only, Low (Still Water)

Flow expectations are close enough for one layout.

Space used
UndulataMidground and Background
Brown Hoplo CatfishBottom (Substrate) and Middle (Open Water)
Pressure signals
UndulataHigh uproot resistance, Standard leaves
Brown Hoplo CatfishPeaceful, Hyperactive / Fast Swimmer, Digger (Disturbs Substrate), and Plant Destroyer

Plant pressure: High.

Planting value
UndulataBreaks lines of sight, Good refuge for shrimp, and Good grazing surface, Nutrient-rich substrate preferred
Brown Hoplo CatfishSand (Sifters) and Smooth Gravel (Sensitive Barbels)

Shared Tank Conditions

Undulata fits inside the water range normally used for Brown Hoplo Catfish. The shared window is about 20 to 28 °C, pH 6 to 8, and 4 to 15 dGH, which gives you enough room to aim for stable middle-ground conditions.

Both do best with gentle, low-flow water, so circulation does not need to be split into competing zones.

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

Fish Pressure and Plant Resilience

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

Undulata has moderate cover density, high uproot resistance, and standard leaves. It can also help with breaking up sight lines, shrimp refuge, and grazing surfaces.

Undulata is less tempting than softer, more palatable plants for known nibblers.

The point to watch is brown Hoplo Catfish may still investigate the plant, but the tougher foliage gives it a better chance.

Layout Fit

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

Brown Hoplo Catfish is a catfish, so the pairing works best when the planting style supports how that fish uses space and cover.

Undulata reaches about 25 cm tall by 20 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, shrimp refuge, and grazing surfaces. Place it where Brown Hoplo Catfish 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: Brown Hoplo Catfish may still investigate the plant, but the tougher foliage gives it a better chance.

Best Use Case

Undulata can work with Brown Hoplo Catfish, 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 Undulata and Brown Hoplo Catfish

Is Undulata a good plant for Brown Hoplo Catfish?

Undulata can work with Brown Hoplo Catfish, 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. Fish pressure is the main concern, so the plant needs protection or a tougher substitute.

Can Brown Hoplo Catfish damage Undulata?

Brown Hoplo Catfish may still investigate the plant, but the tougher foliage gives it a better chance.

Do Undulata and Brown Hoplo Catfish share the same water conditions?

Undulata and Brown Hoplo Catfish share a workable water window around 20 to 28 °C, pH 6 to 8, and 4 to 15 dGH. Keep the tank near the middle of that overlap for the best long-term result.

What does Undulata add to a tank with Brown Hoplo Catfish?

Undulata is less tempting than softer, more palatable plants for known nibblers.

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

Brown Hoplo Catfish may still investigate the plant, but the tougher foliage gives it a better chance.

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?
Contact the editorial team

Other Fish for Undulata

Other Plants for Brown Hoplo Catfish