Skip to main content

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

Several warnings stack — the plan is not a clean «good» fit; read each flag before you buy. Review supporting points next, then re-run the check.

Primary issue: Several warnings stack — the plan is not a clean «good» fit; read each flag before you buy. Temperament spread or predators in the mix — feeding order, territory, and observation matter more than in an all-peaceful list. 3 fish across 3 species in 300L. Shared temperature 23–26°C. Stocking: near-limit (load index 277 vs ref 300).

OscarGreen TerrorJack Dempsey

Tank preview300L · 3 fish
1× Oscar1× Green Terror1× Jack Dempsey

Your stock

Oscar
Oscar
35cm · aggressive · 300L min
1
Green Terror
Green Terror
30cm · aggressive · 300L min
1
Jack Dempsey
Jack Dempsey
25cm · aggressive · 200L min
1
VerdictCAUTION

Several warnings stack — the plan is not a clean «good» fit; read each flag before you buy. Review supporting points next, then re-run the check.

Primary issue: Several warnings stack — the plan is not a clean «good» fit; read each flag before you buy. Temperament spread or predators in the mix — feeding order, territory, and observation matter more than in an all-peaceful list. 3 fish across 3 species in 300L. Shared temperature 23–26°C. Stocking: near-limit (load index 277 vs ref 300).
Score 83/100·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.

Pair compatibility for any two species · Fish library

Warnings

  • Stocking is approaching the practical limit for 300L (load index 277 / ref 300).

Positives

  • WaterTemperature ranges overlap comfortably (23–26°C).
  • WaterpH requirements overlap reasonably across the group.
  • StockingEvery listed species has a published minimum tank size at or below 300L.

Water overlap

What every fish can share at the same time

Shared temperature: 2326°C

Shared pH: 6.58.0

Shared temperature range for all species: 23–26°C.

Shared pH window: 6.5–8.0.

Stocking pressure

near limit

Load index 277 vs conservative reference 300 for 300L (adult cm × quantity × bioload weight × territory factor).

Swim-zone distribution

Fish-weighted zone use — top 0.0, middle 1.5, bottom 1.5 (relative biomass per level).

top 0
middle 2
bottom 2

Fix this setup

Grouped by scenario — work through each block in order

Stocking pressure & filtration

  • 1.Avoid adding more large or messy fish; keep a strict maintenance schedule.

Beginner difficulty

moderate

  • Includes intermediate species — stable parameters matter.
  • Several caution flags — needs experience reading fish behaviour.
  • Aggressive species require confident husbandry.
  • Stocking is heavy for the volume — needs reliable filtration and a steady water-change routine.

Behaviour & stress

Bottom territory focus: Oscar, Green Terror, Jack Dempsey.

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