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Compatibility Report

Can Keyhole Cichlid Live With Siamese Algae Eater?

GuideMyTank compatibility analysis for Keyhole Cichlid and Siamese Algae Eater.

Planning verdict

compatible

Recommended

This pair is a reasonable starting point when both species receive their required tank size, group size, water conditions, and routine care.

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

Blocking risks

No automatic safety blocker was found.

Conditions and cautions

  • One species should be maintained in a proper school or group.

Supporting factors

  • Temperature ranges overlap well.
  • pH requirements overlap well.
  • Species have similar temperament.
  • No predation risk detected.
  • Tank size requirements align.
Keyhole Cichlid profileSiamese Algae Eater profileMethodology and limitations

Why This Pair Received Its Verdict

Keyhole Cichlid and Siamese Algae Eater receive a recommended verdict from the current structured assessment. Keyhole Cichlid is recorded as peaceful with an aggression level of 2/10; Siamese Algae Eater is recorded as peaceful with an aggression level of 2/10. 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.
  • Species have similar temperament.
  • One species should be maintained in a proper school or group.

Helpful Links

Use the Compatibility CheckerRead the Compatibility Disclaimer

Water Parameter Overlap

Keyhole Cichlid has a recorded temperature range of 72–79°F and pH range of 6–7.5. Siamese Algae Eater is recorded at 75–79°F and pH 6.5–8. Their shared planning window is 75–79°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

Keyhole Cichlid sets the larger listed base aquarium requirement at 30 gallons; the other listed minimum is 30 gallons. Siamese Algae Eater is the larger adult by the recorded maximum, reaching 6 inches, compared with 4 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.

Behavior and Social Requirements

Keyhole Cichlid is a calm species associated with the mid zone and moderate flow. Siamese Algae Eater is active, uses the bottom zone, and has a high flow preference. Keyhole Cichlid should be planned as a group of at least 2, while siamese algae eater does not have a recorded minimum school larger than one. The aquarium must support both social structures without forcing either species into insufficient space.

Husbandry Fit

Keyhole Cichlid is recorded as a carnivore with easy care, while Siamese Algae Eater is a herbivore with easy care. Their listed preferred tank styles are blackwater 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 Keyhole Cichlid and Siamese Algae Eater; 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 75–79°F.
  • Keep pH within 6.5–7.5.
  • Use at least the larger 30-gallon base requirement before accounting for the complete stocking plan.
  • Keyhole Cichlid should be planned as a group of at least 2; siamese algae eater does not have a recorded minimum school larger than one.
  • Provide a separation plan and monitor feeding, stress, chasing, damaged fins, and access to preferred habitat zones.

Final Recommendation

This pair is a reasonable starting point when both species receive their required tank size, group size, water conditions, and routine care.

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
  • en.wikipedia.orgtaxonomy · medium confidence
  • en.wikipedia.orgtaxonomy · medium confidence
  • es.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

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