GuideMyTank
PisciDexCare GuidesCompatibilityLearning CenterProductsAquarium Builder

© 2026 GuideMyTank

AboutEditorial PolicyContactPrivacy PolicyTerms of ServiceAffiliate DisclosureDisclaimerAdmin Portal
  1. Home
  2. /Compatibility
  3. /Firemouth Cichlid and Glowlight Tetra Compatibility

Compatibility Report

Can Firemouth Cichlid Live With Glowlight Tetra?

GuideMyTank compatibility analysis for Firemouth Cichlid and Glowlight Tetra.

Planning verdict

caution

Conditional

Only plan this pair if every listed condition can be met, and have a separation plan if stress or aggression appears.

Data confidence
high
Assessment source
Structured data model
Data completeness
100%

Blocking risks

No automatic safety blocker was found.

Conditions and cautions

  • One species may be semi-aggressive and require planning.
  • One species should be maintained in a proper school or group.
  • Tank size requirements differ moderately.
  • GH or KH ranges do not overlap well.
  • Territorial footprint and swimming zone overlap require extra space and cover.
  • Breeding aggression can turn an otherwise workable pairing into a caution setup.

Supporting factors

  • Temperature ranges overlap well.
  • pH requirements overlap well.
  • No predation risk detected.
Firemouth Cichlid profileGlowlight Tetra profileMethodology and limitations

Why This Pair Received Its Verdict

Firemouth Cichlid and Glowlight Tetra receive a conditional verdict from the current structured assessment. Firemouth Cichlid is recorded as semi-aggressive with an aggression level of 5/10; Glowlight Tetra is recorded as peaceful with an aggression level of 1/10. The recommendation is based on the combined water, space, behavior, grouping, and predation checks below rather than on species names alone.

  • Temperature ranges overlap well.
  • pH requirements overlap well.
  • One species may be semi-aggressive and require planning.
  • One species should be maintained in a proper school or group.

Helpful Links

Use the Compatibility CheckerRead the Compatibility Disclaimer

Water Parameter Overlap

Firemouth Cichlid has a recorded temperature range of 75–82°F and pH range of 6.5–8. Glowlight Tetra is recorded at 74–82°F and pH 6–7.5. Their shared planning window is 75–82°F for temperature and 6.5–7.5 for pH. A shared aquarium must stay inside the overlap rather than merely touching each species’ outer tolerance.

Aquarium Space and Adult Size

Firemouth Cichlid sets the larger listed base aquarium requirement at 40 gallons; the other listed minimum is 15 gallons. Firemouth Cichlid is the larger adult by the recorded maximum, reaching 6 inches, compared with 1.5 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.

Behavior and Social Requirements

Firemouth Cichlid is a moderate species associated with the mid zone and moderate flow. Glowlight Tetra is moderate, uses the mid zone, and has a moderate flow preference. Firemouth Cichlid does not have a recorded minimum school larger than one, while glowlight tetra should be planned as a group of at least 6. The aquarium must support both social structures without forcing either species into insufficient space.

Husbandry Fit

Firemouth Cichlid is recorded as a omnivore with intermediate care, while Glowlight Tetra is a omnivore with easy care. Their listed preferred tank styles are rockwork and planted. Feeding access, cover, open swimming room, filtration, and observation should be planned around the more demanding requirement rather than averaged between the two species.

What Would Change the Decision?

Use these pair-specific boundaries before treating the verdict as an acceptable stocking plan.

  • Do not proceed unless one stable temperature and pH range can be maintained for both Firemouth Cichlid and Glowlight Tetra; acclimation does not correct an incompatible long-term range.
  • Treat size, predation, and fin-damage warnings as stop conditions. Extra plants cannot reliably make an unsafe predator-to-prey or fin-target pairing safe.
  • Use broken sight lines and multiple retreats, then separate the pair if either species shows persistent chasing, hiding, clamped fins, or loss of feeding access.
  • Recalculate space using the full adult group sizes—not one specimen of each species—and reject the plan if either species must be understocked socially to fit.
  • Prepare a cycled backup or separation option before introduction; individual behavior can be less predictable than species-level records.

Aquarium Planning Checklist

  • Keep temperature within 75–82°F.
  • Keep pH within 6.5–7.5.
  • Use at least the larger 40-gallon base requirement before accounting for the complete stocking plan.
  • Firemouth Cichlid does not have a recorded minimum school larger than one; glowlight tetra should be planned as a group of at least 6.
  • Provide a separation plan and monitor feeding, stress, chasing, damaged fins, and access to preferred habitat zones.

Final Recommendation

Only plan this pair if every listed condition can be met, and have a separation plan if stress or aggression appears.

Sources and Data Provenance

These references support the underlying species records used by this assessment. They do not necessarily evaluate this exact pair together.

  • fishbase.secare · medium confidence
  • fishbase.secare · medium confidence
  • thesprucepets.comcare · medium confidence
  • en.wikipedia.orgtaxonomy · medium confidence
  • en.wikipedia.orgtaxonomy · medium confidence
Read the full methodology and limitations
Report quality
supported
Analysis version
2026.09.1
Species data updated
Jul 2, 2026
Review status
Structured automated assessment

Related Resources

Continue with the most relevant care and compatibility resources for Firemouth Cichlid and Glowlight Tetra.

  • Plan These Species in Aquarium BuilderAdd livestock and validate tank size, stocking, and compatibility.
  • Amano Shrimp and Firemouth Cichlid CompatibilityCompatibility report for Amano Shrimp and Firemouth Cichlid.
  • Amano Shrimp and Glowlight Tetra CompatibilityCompatibility report for Amano Shrimp and Glowlight Tetra.
  • American Flagfish and Firemouth Cichlid CompatibilityCompatibility report for American Flagfish and Firemouth Cichlid.
  • American Flagfish and Glowlight Tetra CompatibilityCompatibility report for American Flagfish and Glowlight Tetra.