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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 · RISKY

Behaviour stack — multiple caution-level pairs or activity mismatches make outcomes harder to predict than a simple community mix. Review supporting points next, then re-run the check.

Primary issue: Behaviour stack — multiple caution-level pairs or activity mismatches make outcomes harder to predict than a simple community mix. Temperament spread or predators in the mix — feeding order, territory, and observation matter more than in an all-peaceful list. 22 fish across 4 species in 200L. Shared temperature 24–26°C. Stocking: balanced (load index 180 vs ref 200).

Electric Blue AcaraBolivian RamCorydoras CatfishHarlequin Rasbora

Tank preview200L · 22 fish
2× Electric Blue Acara2× Bolivian Ram8× Corydoras Catfish10× Harlequin Rasbora

Your stock

Electric Blue Acara
Electric Blue Acara
18cm · semi-aggressive · 150L min
2
Bolivian Ram
Bolivian Ram
8cm · peaceful · 110L min
2
Corydoras Catfish
Corydoras Catfish
6cm · peaceful · 60L min
8
Harlequin Rasbora
Harlequin Rasbora
5cm · peaceful · 60L min
10
VerdictRISKY

Behaviour stack — multiple caution-level pairs or activity mismatches make outcomes harder to predict than a simple community mix. Review supporting points next, then re-run the check.

Primary issue: Behaviour stack — multiple caution-level pairs or activity mismatches make outcomes harder to predict than a simple community mix. Temperament spread or predators in the mix — feeding order, territory, and observation matter more than in an all-peaceful list. 22 fish across 4 species in 200L. Shared temperature 24–26°C. Stocking: balanced (load index 180 vs ref 200).
Score 77/100·Confidence low·Aggressive or predator-leaning mix

One or more species profiles are only partially verified or need verification — treat numbers as planning guidance, not guarantees. At least one species has ID or trade-name ambiguity on file — plan for a typical trade example, not every shop label. Several caution-level pair flags mean real outcomes depend on tank shape, cover, and individual fish. Elevated risk verdict — we bias toward safety; your reading of specialist sources still matters.

Pair compatibility for any two species · Fish library

Warnings

  • Temperature overlap is narrow (24–26°C) — heater thermostat accuracy matters.

Positives

  • WaterpH requirements overlap reasonably across the group.
  • StockingEvery listed species has a published minimum tank size at or below 200L.

Water overlap

What every fish can share at the same time

Shared temperature: 2426°C (narrow band)

Shared pH: 6.57.5

Shared temperature range for all species: 24–26°C.

Shared pH window: 6.5–7.5.

Stocking pressure

balanced

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 12.0, bottom 10.0 (relative biomass per level).

top 0
middle 12
bottom 10

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
  • Electric Blue Acara + Bolivian Ram: Electric Blue Acara + Bolivian Ram: Temperament difference. Electric Blue Acara is semi-aggressive, while Bolivian Ram is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely. Outcomes still depend on your tank shape, maintenance routine, and individual fish.
  • Electric Blue Acara + Corydoras Catfish: Electric Blue Acara + Corydoras Catfish: Temperament difference. Electric Blue Acara is semi-aggressive, while Corydoras Catfish is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely. Outcomes still depend on your tank shape, maintenance routine, and individual fish.
  • Electric Blue Acara + Harlequin Rasbora: Electric Blue Acara + Harlequin Rasbora: Temperament difference. Electric Blue Acara is semi-aggressive, while Harlequin Rasbora is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely. Outcomes still depend on your tank shape, maintenance routine, and individual fish.
  • Bolivian Ram + Corydoras Catfish: Bolivian Ram + Corydoras Catfish: Narrow temperature overlap. Bolivian Ram and Corydoras Catfish have only a narrow shared temperature range. Maintaining stable water temperature will be important. Outcomes still depend on your tank shape, maintenance routine, and individual fish.

Temperament gap

warning· temperament
  • Electric Blue Acara (semi-aggressive) and Bolivian Ram (peaceful) — needs space, line-of-sight breaks, and observation.
  • Electric Blue Acara (semi-aggressive) and Corydoras Catfish (peaceful) — needs space, line-of-sight breaks, and observation.
  • Electric Blue Acara (semi-aggressive) and Harlequin Rasbora (peaceful) — needs space, line-of-sight breaks, and observation.

Pairs checked: 6 · RISKY pair flags: 0 · CAUTION: 4

Fix this setup

Grouped by scenario — work through each block in order

Layout & swim zones

  • 1.Add structure (caves, tall plants) and consider species that use under-represented zones.

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

moderate

  • Includes intermediate species — stable parameters matter.
  • Several caution flags — needs experience reading fish behaviour.

Behaviour & stress

Bottom territory focus: Electric Blue Acara, Bolivian Ram.

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