Is Stringy Moss a Good Plant for Blue Back Blue Eye?

Reviewed by Guidarium Editorial DeskUpdated May 2, 2026

Not Recommended

Stringy Moss is not recommended for Blue Back Blue Eye. The issue is practical, not cosmetic: they are adapted to different water types.

Stringy Moss

Leptodictyum riparium

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PlacementAttached to hardscape

LightLow

DifficultyBeginner

Size20 × 15 cm

Blue Back Blue Eye

Pseudomugil cyanodorsalis

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TemperamentPeaceful

FamilyRainbowfish

Temp22–30°C

Water TypeBrackish Required

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

62/100

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

Water match

Limited overlap

One or more core water ranges does not overlap cleanly.

Plant pressure

Low

Blue Back Blue Eye is not flagged as unusually hard on this plant.

Layout value

Moderate cover

Stringy Moss helps with good refuge for shrimp, good refuge for fry, good grazing surface, 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.

FactorStringy MossBlue Back Blue Eye

Temperature

Stringy Moss10-28°C

Blue Back Blue Eye22-30°C

Overlap: 22-28°C.

Stringy Moss6-8

Blue Back Blue Eye7-8.5

Overlap: pH 7-8.

Hardness

Stringy Moss2-15 dGH

Blue Back Blue Eye10-30 dGH

Overlap: 10-15 dGH.

Water and flow

Stringy MossFreshwater Only, Low (Still Water)

Blue Back Blue EyeBrackish Required, Moderate (Standard)

Flow expectations are close enough for one layout.

Space used

Stringy MossAttached to hardscape, Midground, and Background

Blue Back Blue EyeTop (Surface) and Middle (Open Water)

Pressure signals

Stringy MossLow uproot resistance, Delicate leaves

Blue Back Blue EyePeaceful, Nano / Bite-sized (Predation Risk), Jumper (Lid Required), and Hyperactive / Fast Swimmer

Plant pressure: Low.

Planting value

Stringy MossGood refuge for shrimp, Good refuge for fry, Good grazing surface, and Useful spawning site, No substrate required

Blue Back Blue EyeDriftwood (Digestion/Hiding) and Sand (Sifters)

Shared Tank Conditions

Stringy Moss and Blue Back Blue Eye do not share a clean environmental window, so the pairing is already under pressure before behaviour is even considered.

Their flow expectations are close enough to combine: Stringy Moss prefers gentle, low-flow water, while Blue Back Blue Eye prefers moderate flow.

Water type is a serious mismatch: Stringy Moss is listed for freshwater, while Blue Back Blue Eye is listed for brackish water.

Fish Pressure and Plant Resilience

Blue Back Blue Eye does not put unusual pressure on this plant compared with harder fish-plant combinations.

Stringy Moss has moderate cover density, low uproot resistance, and delicate leaves. It can also help with shrimp refuge, fry refuge, grazing surfaces, and spawning sites.

Its structure adds useful refuge value beyond the normal visual role of the plant.

The limiting issue is they are adapted to different water types.

Layout Fit

Stringy Moss is a moss / liverwort usually used attached to hardscape, midground, and background.

Blue Back Blue Eye is a rainbowfish, so the pairing works best when the planting style supports how that fish uses space and cover.

Stringy Moss reaches about 20 cm tall by 15 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 shrimp refuge, fry refuge, grazing surfaces, and spawning sites. Place it where Blue Back Blue Eye 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: They are adapted to different water types.

Best Use Case

Stringy Moss is usually the wrong plant for Blue Back Blue Eye 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.