Uses the classic 1 cm of fish per 2 L (≈ 1 inch per gallon) rule of thumb.
≈ 15.9 gallons
1 male per tank only
Understocked
You have room for more fish. Add slowly, one species at a time.
This is a rough guideline. Real-world stocking depends on filtration, plants, water changes, and fish behaviour. Always cycle your tank and research each species before stocking.