- Hiap Khoon Aquarium Trading [ Link to website ]
- Happy Aquarium
- Hai Peng Aquarium
- Hausmann Marketing Aquarium
- H2O Aquarium & Hobby
- Hill View Aquarium
- Hong Tai Aquarium
- Hup Soon Aquarium
- Hai Joo Trading Co
- Han's Quality Koi
- Harry's Aqua Mart
- Heckel & Altum
- Heisenberg Singapore Pte Ltd
- Heng Hang Huat
- Hobbyist Universal
- Holland Aquarium & Trading
- Home of Cichlids Aquarium
- Hu Chuan Chin
- Hup Seng Aquarium & Fresh Flower Shop