Stocking plan
Plan a freshwater tank stocking
Set volume, add species with the numbers you actually plan to keep, and get a conservative verdict for the whole stocking — bioload, group size, zone crowding, and multi-species conflicts, not a single pair in isolation. Use the editor first; the planning notes below explain why a pairwise match still needs a tank-level check.
Shared plan · CAUTION
Group sizes are under hobby norms for at least one social species — behaviour and stress follow group size. Review supporting points next, then re-run the check.
Primary issue: Group sizes are under hobby norms for at least one social species — behaviour and stress follow group size. Temperament spread or predators in the mix — feeding order, territory, and observation matter more than in an all-peaceful list. 8 fish across 3 species in 200L. Shared temperature 24–28°C. Stocking: near-limit (load index 180 vs ref 200).
Your stock
Group sizes are under hobby norms for at least one social species — behaviour and stress follow group size. Review supporting points next, then re-run the check.
One or more species profiles are only partially verified or need verification — treat numbers as planning guidance, not guarantees.
Pair compatibility for any two species · Fish library
Warnings
- Swordtail does best in groups of 3+; you have 1.
- pH overlap is tight — large water changes can swing chemistry outside the safe band.
- Stocking is approaching the practical limit for 200L (load index 180 / ref 200).
Positives
- WaterTemperature ranges overlap comfortably (24–28°C).
Water overlap
What every fish can share at the same time
Shared temperature: 24–28°C
Shared pH: 7.0–7.5 (tight overlap)
Shared temperature range for all species: 24–28°C.
Shared pH window: 7.0–7.5.
Stocking pressure
near limit
Load index 180 vs conservative reference 200 for 200L (adult cm × quantity × bioload weight × territory factor).
Swim-zone distribution
Fish-weighted zone use — top 0.0, middle 4.5, bottom 3.5 (relative biomass per level).
Most biomass leans toward one swim level — shy fish may feel exposed or outcompeted at feeding time.
Fix this setup
Grouped by scenario — work through each block in order
Schooling & group sizes
- 1.Add more Swordtail to reach at least 3 individuals, or remove the species.
Stocking pressure & filtration
- 1.Avoid adding more large or messy fish; keep a strict maintenance schedule.
Layout & swim zones
- 1.Add structure (caves, tall plants) and consider species that use under-represented zones.
Beginner difficulty
moderate
- Includes intermediate species — stable parameters matter.
- Several caution flags — needs experience reading fish behaviour.
- Stocking is heavy for the volume — needs reliable filtration and a steady water-change routine.
Behaviour & stress
Bottom territory focus: Firemouth Cichlid, Electric Blue Acara.
Schooling / group size
- Swordtail does best in groups of 3+; you have 1.
Fish behaviour varies. Fishori gives conservative planning guidance based on adult size, temperament, tank size and common aquarium care sources.