Back to Radican Sword fish guides

Is Radican Sword a Good Plant for San Juan Cory?

Reviewed by Guidarium Editorial DeskUpdated May 11, 2026
Strong Fit

Radican Sword is a strong fit for San Juan Cory. The shared water window is realistic, and the plant has enough structure or resilience to be useful in a tank built around this fish. The match depends on anchoring and placement more than the water numbers alone.

Radican Sword

Echinodorus cordifolius

View plant profile
PlacementMidground
LightModerate
DifficultyBeginner
Size60 × 40 cm

San Juan Cory

Corydoras bilineatus

View fish profile
TemperamentPeaceful
FamilyCatfish
Temp22–26°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

84/100

The plant and fish suit each other well.

Water match

Workable overlap

Shared range: 22-26°C, pH 6-7.5, 4-15 dGH.

Plant pressure

Moderate

Radican Sword needs thoughtful placement and anchoring.

Layout value

High cover

Radican Sword helps with breaks lines of sight, useful spawning site, provides surface cover, 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
Radican Sword20-28°C
San Juan Cory22-26°C

Overlap: 22-26°C.

pH
Radican Sword6-7.5
San Juan Cory6-7.5

Overlap: pH 6-7.5.

Hardness
Radican Sword2-15 dGH
San Juan Cory4-18 dGH

Overlap: 4-15 dGH.

Water and flow
Radican SwordFreshwater Only, Low (Still Water)
San Juan CoryFreshwater Only, Low (Still Water)

Flow expectations are close enough for one layout.

Space used
Radican SwordMidground and Background
San Juan CoryBottom (Substrate)
Pressure signals
Radican SwordHigh uproot resistance, Tough / leathery leaves
San Juan CoryPeaceful, Hyperactive / Fast Swimmer and Digger (Disturbs Substrate)

Plant pressure: Moderate.

Planting value
Radican SwordBreaks lines of sight, Useful spawning site, Provides surface cover, and Good grazing surface, Nutrient-rich substrate preferred
San Juan CorySand (Sifters) and Smooth Gravel (Sensitive Barbels)

Shared Tank Conditions

Radican Sword fits inside the water range normally used for San Juan Cory. The shared window is about 22 to 26 °C, pH 6 to 7.5, 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

San Juan Cory 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.

Radican Sword has high cover density, high uproot resistance, and tough / leathery leaves. It can also help with breaking up sight lines, spawning sites, surface cover, and grazing surfaces.

Radican Sword brings useful structure to the tank instead of serving only as decoration.

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

Layout Fit

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

San Juan Cory is a catfish, so the pairing works best when the planting style supports how that fish uses space and cover.

Radican Sword reaches about 60 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, spawning sites, surface cover, and grazing surfaces. Place it where San Juan Cory can actually use that structure instead of hiding the plant where it cannot do much.

Practical Recommendation

This is a sensible planted-tank choice for San Juan Cory, especially when you want the plant to do real work as cover, sight-line structure, or habitat detail.

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

Best Use Case

Radican Sword is a strong choice for San Juan Cory when you want the plant to do real work in the tank, not just survive in the background. The pairing tends to perform best when the plant's cover, resilience, or placement naturally supports how the fish moves, hides, or claims space.

Frequently Asked Questions About Radican Sword and San Juan Cory

Is Radican Sword a good plant for San Juan Cory?

Radican Sword is a strong fit for San Juan Cory. The shared water window is realistic, and the plant has enough structure or resilience to be useful in a tank built around this fish. The match depends on anchoring and placement more than the water numbers alone.

Can San Juan Cory damage Radican Sword?

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

Do Radican Sword and San Juan Cory share the same water conditions?

Radican Sword and San Juan Cory share a workable water window around 22 to 26 °C, pH 6 to 7.5, and 4 to 15 dGH. Keep the tank near the middle of that overlap for the best long-term result.

What does Radican Sword add to a tank with San Juan Cory?

Radican Sword mainly adds structure, visual softness, and a more natural layout when the fish leaves it alone. Radican Sword has high cover density, high uproot resistance, and tough / leathery leaves. It can also help with breaking up sight lines, spawning sites, surface cover, and grazing surfaces.

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 11, 2026
Last updated
May 11, 2026
Issues or corrections?
Contact the editorial team

Other Fish for Radican Sword

Other Plants for San Juan Cory