Best Aquarium Fish for Singapore Homes: Tropical Species That Suit Warm Indoor Tanks
Singapore's climate is a natural advantage for tropical fishkeeping. The year-round indoor temperature of 26–30°C is perfect for most tropical freshwater fish — often eliminating the need for an aquarium heater entirely, or requiring only a small heater for fine temperature control. Singapore tap water is also relatively soft and slightly acidic, suitable for a wide range of species without chemical adjustment.
Here are the best aquarium fish for Singapore homes — species that genuinely thrive in local conditions.
Why Singapore's Climate Matters for Fish Choice
- No cold winters: Tropical fish never experience cold stress in Singapore
- Consistent temperature: Avoids the seasonal swings that stress sensitive species in temperate countries
- Warm tap water: Singapore tap water temperature is typically 27–30°C — ideal for tropical species
- Soft, slightly acidic tap water: pH ~7.0–7.2, GH ~6–8° — suitable for most community tropicals without adjustment
Best Fish for Singapore Homes
1. Guppies
Guppies are the quintessential Singapore home aquarium fish. They breed readily, come in endless colour varieties, and thrive at Singapore's ambient temperature without any heating. Singapore's own fish farms export guppies globally.
Temperature: 22–30°C | pH: 6.5–8.0 | Min tank: 20 litres
2. Molly Fish
Mollies are robust livebearers that actually prefer warmer water — Singapore's ambient temperature is closer to their ideal than many temperate countries. They come in striking black, white, gold, and dalmatian varieties.
Temperature: 24–30°C | pH: 7.0–8.5 | Min tank: 40 litres
3. Neon Tetra
Neon tetras have long been Singapore's most popular imported schooling fish. They thrive in soft, slightly acidic Singapore tap water and look spectacular in groups of 15 or more.
Temperature: 20–26°C | pH: 5.5–7.0 | Min tank: 60 litres
Note: Neon tetras prefer slightly cooler water than Singapore's ambient temperature. In non-air-conditioned rooms above 28°C, use a small chiller or keep the room cool.
4. Harlequin Rasbora
Harlequin rasboras are native to Southeast Asia — Malaysia, Thailand, and Sumatra — and are perfectly adapted to Singapore's warm water and soft, slightly acidic conditions. They are among the most reliable and widely available fish in Singapore.
Temperature: 22–27°C | pH: 6.0–7.5 | Min tank: 40 litres
5. Platy Fish
Platies are extraordinarily adaptable livebearers that tolerate a wide temperature range, breed readily, and come in vivid colour forms. They are one of the most forgiving fish for Singapore apartments, including those with variable air-conditioning.
Temperature: 20–28°C | pH: 7.0–8.0 | Min tank: 30 litres
6. Betta Fish
Bettas are native to the warm, still waters of Southeast Asia — Thailand, Malaysia, Cambodia — and are physiologically optimised for Singapore's ambient temperature and water. A single male betta in a 30+ litre planted tank is one of the most beautiful and low-maintenance setups possible.
Temperature: 24–30°C | pH: 6.5–7.5 | Min tank: 30 litres
7. Corydoras Catfish
Corydoras from South America are highly adaptable and widely bred in Singapore. Most species handle Singapore's tap water parameters without any adjustment, making them reliable additions to any community tank.
Temperature: 22–28°C | pH: 6.0–7.5 | Min tank: 40 litres
8. Cherry Shrimp (Neocaridina)
Cherry shrimp from Taiwan are adapted to warm, soft water — exactly what Singapore tap water provides. They breed readily in Singapore conditions and add constant colour and activity to planted nano tanks.
Temperature: 18–28°C | pH: 6.5–8.0 | Min tank: 10 litres
Singapore Tap Water: Parameter Summary
PUB Singapore tap water (post-treatment):
- pH: 7.0–7.8
- GH: ~6–8°
- KH: ~2–4°
- Chlorine/chloramine: Requires dechlorinator before use
- Temperature at tap: 27–30°C
This is suitable without modification for: guppies, platies, mollies, bettas, harlequin rasboras, most corydoras, most barbs, and neocaridina shrimp.
For neon tetras, cardinal tetras, and discus (preferring softer, slightly more acidic water), Singapore tap water is acceptable but ideal parameters require some adjustment.
Browse our full freshwater livestock collection — all species listed available for delivery across Singapore.