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 · RISKY
Schooling welfare — a shoaling species is below the safe minimum group size. Review supporting points next, then re-run the check.
Primary issue: Schooling welfare — a shoaling species is below the safe minimum group size. Hard conflicts on file (water, pairing, size, or bettas) — resolve red items before fine-tuning decor or food. 3 fish across 3 species in 180L. Shared temperature 24–28°C. Stocking: understocked (load index 37 vs ref 180).
Your stock
Schooling welfare — a shoaling species is below the safe minimum 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. Elevated risk verdict — we bias toward safety; your reading of specialist sources still matters.
Pair compatibility for any two species · Fish library
Critical problems
- Congo Tetra is a schooling/shoaling species — keeping only 1 is a serious welfare risk; aim for at least 8.
Water overlap
What every fish can share at the same time
Shared temperature: 24–28°C
Shared pH: 6.0–7.5
Shared temperature range for all species: 24–28°C.
Shared pH window: 6.0–7.5.
Stocking pressure
understocked
Load index 37 vs conservative reference 180 for 180L (adult cm × quantity × bioload weight × territory factor).
Swim-zone distribution
Fish-weighted zone use — top 1.5, middle 1.5, bottom 0.0 (relative biomass per level).
Fix this setup
Grouped by scenario — work through each block in order
Schooling & group sizes
- 1.Add more Congo Tetra to reach at least 8 individuals, or remove the species.
Overall plan
- 1.Choose one direction: remove the highest-risk species first, or change the tank class (length, volume, filtration) to match the adults you intend to keep — halfway plans fail most often here.
Suggested swaps
- Single-biome community: e.g. soft-water South Americans together (tetras + corydoras + small gourami) — run the pair tool for every add-on.
- Species or centrepiece tank: one main species (or one compatible pair group) in a right-sized aquarium with dither fish from the same water profile — not random continent mixing.
Beginner difficulty
advanced
- Includes intermediate species — stable parameters matter.
- Serious compatibility or tank-size issues — not a beginner layout until resolved.
Schooling / group size
- Congo Tetra is a schooling/shoaling species — keeping only 1 is a serious welfare risk; aim for at least 8.
Fish behaviour varies. Fishori gives conservative planning guidance based on adult size, temperament, tank size and common aquarium care sources.