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
Predation risk dominates — at least one adult fish is likely to eat or badly injure a smaller tank mate once grown. Review supporting points next, then re-run the check.
Primary issue: Predation risk dominates — at least one adult fish is likely to eat or badly injure a smaller tank mate once grown. Hard conflicts on file (water, pairing, size, or bettas) — resolve red items before fine-tuning decor or food. Shared temperature can still exist on paper — that does not cancel adult predation risk once fish grow into their mouths. 8 fish across 3 species in 100L. Shared temperature 20–26°C. Stocking: near-limit (load index 109 vs ref 100). 2 high-severity pairing flag(s).
Your stock
Predation risk dominates — at least one adult fish is likely to eat or badly injure a smaller tank mate once grown. 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
- Tinfoil barb needs about 500L minimum for adult size (~35cm) and normal swimming space — your 100L tank is below that. Shop size is not adult size.
- Neon Tetra is a schooling/shoaling species — keeping only 1 is a serious welfare risk; aim for at least 6.
- Ticto / twospot barb + Tinfoil barb: Ticto / twospot barb + Tinfoil barb: Tank may be too small. Ticto / twospot barb and Tinfoil barb together need at least 500 litres. Your tank is 100 litres. Real tanks add variables Fishori cannot model; treat this as a high-risk read, not certainty.
- Neon Tetra + Tinfoil barb: Neon Tetra + Tinfoil barb: Tank may be too small. Neon Tetra and Tinfoil barb together need at least 500 litres. Your tank is 100 litres. Real tanks add variables Fishori cannot model; treat this as a high-risk read, not certainty.
Warnings
- Tinfoil barb does best in groups of 5+; you have 1.
Water overlap
What every fish can share at the same time
Shared temperature: 20–26°C
Shared pH: 6.0–7.0
Shared temperature range for all species: 20–26°C.
Shared pH window: 6.0–7.0.
Stocking pressure
near limit
Load index 109 vs conservative reference 100 for 100L (adult cm × quantity × bioload weight × territory factor).
Swim-zone distribution
Fish-weighted zone use — top 0.5, middle 4.5, bottom 3.0 (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: avoid
critical· other- Ticto / twospot barb + Tinfoil barb: Ticto / twospot barb + Tinfoil barb: Tank may be too small. Ticto / twospot barb and Tinfoil barb together need at least 500 litres. Your tank is 100 litres. Real tanks add variables Fishori cannot model; treat this as a high-risk read, not certainty.
- Neon Tetra + Tinfoil barb: Neon Tetra + Tinfoil barb: Tank may be too small. Neon Tetra and Tinfoil barb together need at least 500 litres. Your tank is 100 litres. Real tanks add variables Fishori cannot model; treat this as a high-risk read, not certainty.
Pairs checked: 3 · RISKY pair flags: 2 · CAUTION: 0
Fix this setup
Grouped by scenario — work through each block in order
Volume & minimum tank
- 1.Increase tank size to at least 500L, or remove Tinfoil barb from this stocking plan.
Schooling & group sizes
- 1.Add more Neon Tetra to reach at least 6 individuals, or remove the species.
- 2.Add more Tinfoil barb to reach at least 5 individuals, or remove the species.
Species pairing & temperament
- 1.Clear each unsafe species pair by removing or replacing one side — do not stock while red compatibility flags remain.
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.
- Where a pleco is the volume problem, consider bristlenose pleco instead of common pleco for sub-200L plans.
Beginner difficulty
advanced
- Includes intermediate species — stable parameters matter.
- Serious compatibility or tank-size issues — not a beginner layout until resolved.
Schooling / group size
- Neon Tetra is a schooling/shoaling species — keeping only 1 is a serious welfare risk; aim for at least 6.
- Tinfoil barb does best in groups of 5+; you have 1.
Fish behaviour varies. Fishori gives conservative planning guidance based on adult size, temperament, tank size and common aquarium care sources.