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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 · GOOD

On paper this can work — still match filtration, adult sizes, and run pair checks; real fish may surprise you.

Single-species or centrepiece lean — fewer cross-species surprises; match temperature and pH tightly to that fish. 1 fish across 1 species in 500L. Shared temperature 24–28°C. Stocking: understocked (load index 80 vs ref 500).

Black ghost knifefish

Tank preview500L · 1 fish
1× Black ghost knifefish

Your stock

Black ghost knifefish
Black ghost knifefish
45cm · semi-aggressive · 500L min
1
VerdictGOOD

On paper this can work — still match filtration, adult sizes, and run pair checks; real fish may surprise you.

Single-species or centrepiece lean — fewer cross-species surprises; match temperature and pH tightly to that fish. 1 fish across 1 species in 500L. Shared temperature 24–28°C. Stocking: understocked (load index 80 vs ref 500).
Score 100/100·Confidence low·Species / centrepiece lean

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

Positives

  • WaterTemperature ranges overlap comfortably (24–28°C).
  • WaterpH requirements overlap reasonably across the group.
  • StockingEvery listed species has a published minimum tank size at or below 500L.

Water overlap

What every fish can share at the same time

Shared temperature: 2428°C

Shared pH: 6.07.2

Shared temperature range for all species: 24–28°C.

Shared pH window: 6.0–7.2.

Stocking pressure

understocked

Load index 80 vs conservative reference 500 for 500L (adult cm × quantity × bioload weight × territory factor).

Swim-zone distribution

Fish-weighted zone use — top 0.0, middle 0.5, bottom 0.5 (relative biomass per level).

top 0
middle 1
bottom 1

Beginner difficulty

advanced

  • Includes advanced-care species.

Fish behaviour varies. Fishori gives conservative planning guidance based on adult size, temperament, tank size and common aquarium care sources.