FastAquatics
Tank stocking ideas

55-gallon tank stocking ideas

4 themed stocking plans with exact species + counts + notes. Pick the theme that fits your goals, then verify with the stocking calculator.

4 themed stocking ideas for 55-gallon

1. Large community

  • 20x Cardinal tetras
  • 15x Rummy nose tetras
  • 8x Corydoras sterbai
  • 6x Otocinclus
  • 1x Bristlenose pleco
  • 1x Pair Pearl gourami
  • 1x Pair German blue rams

Notes: Two schools + bottom dwellers + 2 centerpiece pairs. Lush planted background.

2. Mbuna African cichlid (smaller)

  • 6x Yellow labs
  • 6x Acei
  • 4x Demasoni
  • 3x Rusty cichlid
  • Maximum rockwork structure (holey limestone)

Notes: 20 fish total - mbuna require overstocking to spread aggression. Aragonite sand + hard alkaline water.

3. Discus group

  • 6-8x Discus juveniles (grow into adults)
  • 10x Cardinal tetras (dither)
  • 6x Corydoras
  • Driftwood + Indian almond leaves

Notes: RODI + soft acidic water. Daily 25% water changes during growth phase. Premium discus from German lineage.

4. Goldfish (single fancy)

  • 1-2x Fancy goldfish (oranda, ranchu, ryukin)
  • 4-6x Otocinclus or zebra danios as cleanup

Notes: Coldwater goldfish setup. Heavy filtration (2x AquaClear 110). Weekly 30% water changes due to bio-load.

Verify your stocking plan

Use the stocking calculator to verify the exact species + counts work in your 55-gallon. Also check the water change calculator for ongoing maintenance, and the setup guide library for the full build playbook.

Other tank sizes

Browse all stocking idea pages from 5g nano to 180g show-tier. Or jump to the stocking blueprints for build-along plans with timelines.