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. 13 fish across 3 species in 30L. Shared temperature 24–28°C. Stocking: balanced (load index 26 vs ref 30).
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
- Cherry Shrimp does best in groups of 10+; you have 8.
- pH overlap is tight — large water changes can swing chemistry outside the safe band.
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
balanced
Load index 26 vs conservative reference 30 for 30L (adult cm × quantity × bioload weight × territory factor).
Swim-zone distribution
Fish-weighted zone use — top 0.5, middle 6.5, bottom 6.0 (relative biomass per level).
Most biomass leans toward one swim level — shy fish may feel exposed or outcompeted at feeding time.
Compatibility summary
Species pairing: needs care
warning· other- Betta + Cherry Shrimp: Betta + Cherry Shrimp: Caution advised. Some bettas ignore adult cherry shrimp in a heavily planted tank. Others hunt the colony to zero in a fortnight. Bettas vary, so plan a backup home for the shrimp before mixing. Outcomes still depend on your tank shape, maintenance routine, and individual fish.
Temperament gap
warning· temperament- Betta (semi-aggressive) and Cherry Shrimp (peaceful) — needs space, line-of-sight breaks, and observation.
- Betta (semi-aggressive) and Nerite Snail (peaceful) — needs space, line-of-sight breaks, and observation.
Pairs checked: 3 · RISKY pair flags: 0 · CAUTION: 1
Fix this setup
Grouped by scenario — work through each block in order
Schooling & group sizes
- 1.Add more Cherry Shrimp to reach at least 10 individuals, or remove the species.
Layout & swim zones
- 1.Add structure (caves, tall plants) and consider species that use under-represented zones.
Beginner difficulty
easy
Behaviour & stress
With Cherry Shrimp: watch for fin damage or chasing; keep a backup plan if aggression appears.
With Nerite Snail: watch for fin damage or chasing; keep a backup plan if aggression appears.
Schooling / group size
- Cherry Shrimp does best in groups of 10+; you have 8.
Fish behaviour varies. Fishori gives conservative planning guidance based on adult size, temperament, tank size and common aquarium care sources.