Community Tank Stocking Guide

Build the perfect community aquarium! Fish compatibility charts, stocking examples, and common mistakes to avoid.

besatz · 6 Min. Lesezeit · stocking, community tank, compatibility, planning

Community Tank Stocking Guide

Creating a thriving community tank requires understanding fish compatibility, behavior, and bioload. Here's how to build a peaceful, balanced aquarium.

Core Principles of Community Stocking

1. Temperament Compatibility

Peaceful + Peaceful: ✅ Tetras, Rasboras, Corydoras
Peaceful + Semi-aggressive: ⚠️ Risk of bullying
Aggressive + Aggressive: ❌ Constant fighting, injuries

2. Water Parameter Match

All fish must thrive in the same pH, GH, and temperature range.

3. Swimming Zones (Vertical Stocking)

Top: Hatchetfish, surface feeders
Middle: Tetras, Rasboras, Barbs
Bottom: Corydoras, Loaches, Plecos

Stocking all zones creates visual balance and reduces competition.

4. Schooling Requirements

Schooling fish need groups of 6+ minimum or they become stressed and hide.

Example Community Builds

100-Liter (25-Gallon) Community

Top Level:

8 Harlequin Rasboras

Middle Level:

10 Neon Tetras or Cardinal Tetras
6 Cherry Barbs

Bottom Level:

8 Corydoras (Albino, Bronze, or Panda)
1 Bristlenose Pleco

Cleanup Crew:

5 Nerite Snails
10 Cherry Shrimp

Total: ~42 fish + inverts

200-Liter (50-Gallon) Community

Top Level:

6 Marble Hatchetfish

Middle Level:

15 Rummy-nose Tetras
12 Ember Tetras
2 Pearl Gouramis (1 male, 1 female)

Bottom Level:

10 Corydoras Sterbai
6 Kuhli Loaches
1 Bristlenose Pleco

Cleanup Crew:

6 Nerite Snails
20 Amano Shrimp

Total: ~72 fish + inverts

Fish Compatibility Chart

Excellent Community Fish (Peaceful)

Tetras: Neon, Cardinal, Rummy-nose, Ember, Black Skirt
Rasboras: Harlequin, Chili, Lambchop
Corydoras: All species (Bronze, Panda, Sterbai, etc.)
Gouramis: Honey, Dwarf, Pearl (1 male per tank)
Livebearers: Guppies, Platies, Endlers (avoid Mollies — need harder water)
Loaches: Kuhli, Yo-Yo (in groups)

Proceed with Caution (Semi-aggressive)

Tiger Barbs: Keep in groups of 10+ or they fin-nip
Angelfish: Can eat small fish like Neon Tetras once grown
Bettas: Males aggressive to other bettas and long-finned fish
Dwarf Cichlids (Rams, Apistos): Territorial when breeding

Avoid in Community Tanks

❌ Oscars, Jack Dempseys (large, aggressive cichlids)
❌ Red-tailed Sharks (territorial bullies)
❌ Chinese Algae Eaters (become aggressive with age)
❌ Common Plecos (grow to 45cm+)

Stocking Order (Most Peaceful → Most Assertive)

Add fish gradually over 4-8 weeks:

Week 1-2: Corydoras, snails (hardy, peaceful)
Week 3-4: Schooling fish (Tetras, Rasboras)
Week 5-6: Mid-level schooling fish
Week 7-8: Centerpiece fish (Gouramis, Angelfish)

Why this order? Peaceful fish establish territories first, reducing aggression when more assertive fish are added.

Common Stocking Mistakes

1. Too Many Centerpiece Fish

Bad: 3 Bettas, 2 Gouramis, 4 Angelfish in one tank

Better: 1 centerpiece species (2 Gouramis OR 4 Angelfish)

2. Insufficient School Sizes

Bad: 3 Neon Tetras (stressed, hiding)

Better: 10+ Neon Tetras (confident, active, colorful)

3. Incompatible Water Needs

Bad: Discus (soft, acidic, 28-30°C) + Goldfish (cold, alkaline, 18-22°C)

Better: Stock fish with matching requirements

4. Overstocking

Use AqAdvisor.com to calculate stocking levels including filtration and maintenance habits.

Quarantine New Fish

Always quarantine new arrivals for 2-4 weeks in a separate tank to prevent disease outbreaks.

Quarantine Setup:

20-40 liter bare tank
Sponge filter
Heater
PVC pipes or plants for hiding

Watch for: Ich (white spots), fin rot, lethargy, refusal to eat

Conclusion

A successful community tank is about research, patience, and compatibility. Stock slowly, observe behavior, and adjust as needed.

Happy, compatible fish = a stunning, peaceful aquarium!

Community Tank Stocking Guide