50 Gallon Tank Stocking Options Guide

This 50 gallon tank stocking options guide gives you eight complete stocking plans tested at Gensou Aquascaping, 5 Everton Park on 91 x 46 x 48 cm (~189 L) builds. Rather than list species abstractly, each plan shows a cohesive community with counts, tank roles and Singapore sourcing notes.

The 189 L Bioload Budget

A conservative rule: 1 cm adult fish per 1.5 L in a planted tank. That’s roughly 125 cm of fish, or 60 small tetras, or 30 medium community fish. Heavy planting plus canister filtration at 6x turnover lets you push 10-15% above this safely.

Plan 1: Amazon Blackwater Community

20 cardinal tetras, 12 sterbai corydoras, 1 angelfish pair, 15 amano shrimp. Plants: amazon sword, crypt wendtii, anubias on driftwood. Peat-tinted water. Budget SGD $180 fish + $40 plants.

Plan 2: Southeast Asian Biotope

20 harlequin rasboras, 10 kuhli loaches, 3 pearl gouramis, 2 Otocinclus. Plants: cryptocoryne species, java fern, bolbitis. Browning leaves add to the mood. SGD $160 fish.

Plan 3: Dwarf Cichlid Feature

1 male + 3 female apistogramma cacatuoides, 20 ember tetras, 10 pygmy corydoras, cherry shrimp colony. Plants: tiger lotus centre, crypts midground. The apistos breed readily. See our apistogramma breeding guide. SGD $200 fish.

Plan 4: Peaceful Community Classic

15 rummynose tetras, 10 neon tetras, 6 sterbai corydoras, 3 honey gouramis, 10 amano shrimp. Works with any planted layout. SGD $140 fish.

Plan 5: Livebearer Colony

10 endler’s livebearers (mixed sex), 8 platies, 6 corydoras panda, 3 Otocinclus. Higher GH preferred — add crushed coral to filter. Babies are free fish food for the otocinclus overflow. SGD $100 fish.

Plan 6: Rainbowfish Showcase

8 boesemani rainbowfish, 8 turquoise rainbowfish, 10 congo tetras, 6 sterbai cory. Colour under Chihiros WRGB II 60 is genuinely spectacular. SGD $240 fish.

Plan 7: Shrimp-Dominant Planted

80 cherry shrimp + 30 amano shrimp + 20 ember tetras + 1 honey gourami. Low bioload, heavy plant mass, ideal for weekly-maintenance only. SGD $140 fish + shrimp.

Plan 8: Discus Attempt (Advanced)

4 juvenile discus growing to 3-4 adults, 15 rummynose, 6 sterbai. Requires 30°C constant, RO-blended water, and daily 30% water changes for juveniles. Not a beginner plan. Detailed in our discus primer. SGD $400-$800 fish.

Stocking Mistakes to Avoid

Mixing tiger barbs with long-finned species. Adding bala sharks or common plecos. Keeping two male angelfish (territorial). Single corydoras or kuhli instead of groups of 6+. Our common stocking errors covers the full list.

Every plan above assumes at least 60% of tank surface planted — vallisneria, crypts, anubias, stem midground. This buffers ammonia spikes and visually softens species boundaries. Light planting cuts safe stocking by 30%.

Singapore Sourcing Summary

C328 Clementi covers all tetra species (SGD $2.50-$4 each), corydoras (SGD $6-$12), harlequins (SGD $2), angelfish (SGD $25-$40). Y618 Serangoon North stocks rainbowfish (SGD $18-$40), apistogrammas (SGD $40-$80) and premium angels. Green Chapter Jurong West carries honey gouramis (SGD $8), ember tetras (SGD $2.50), and shrimp colonies. Iwarna Aquafarm handles rare biotope species and discus (SGD $120-$300). Nature Aquarium Gallery Thomson Road pairs livestock with custom scapes. Polyart stocks nerite snails. Carousell lists shrimp colonies SGD $30-$80 and hobbyist cichlid pairs. Shopee covers bulk amano (10 for SGD $25). Quarantine 14 days and acclimatise slowly — our PUB tap water is harder than many Amazon biotopes.

Related Reading

• 50 Gallon Setup Guide
• Best Fish for 50 Gallon
• Apistogramma Breeding SG
• Discus Singapore Primer
• Common Stocking Errors