| Half-beak Dermogenys pusillus |  |
| Honey gourami Colisa chuna |  |
| Hump-backed livebearer, Black striped limia Limia nigrofasciata |  |
| Humphead glassfish Parambassis pulcinella |  |
| Haplochromis obliquidens |  |
| Hasemania nana Silver-tipped tetra |  |
| Hemichromis bimaculatus Jewel cichlid |  |
| Hemigrammus armstrongi Armstrongs tetra, Gold tetra, Brass tetra |  |
| Hemigrammus bleheri Rummy-nosed tetra |  |
| Hemigrammus caudovittatus Buenos Aires Tetra |  |
| Hemigrammus erythrozonus Glowlight tetra |  |
| Heterandria formosa Mosquito fish, Dwarf livebearer | |
| Horabagrus nigricollaris Black collared catfish |  |
| Hypancistrus sp. L260 Queen Arabesque pleco |  |
| Hyphessobrycon bentosi Ornate tetra, White-tipped tetra, Bentos tetra, False rosy tetra |  |
| Hyphessobrycon erythrostigma Bleeding heart tetra |  |
| Hyphessobrycon herbertaxelrodi Black Neon Tetra |  |
Too many fish? Overstocked tanks stress the fish in many ways: competition for food and space, bullying from other fish, deterioration of water quality and increased concentration of disease vectors. A lightly stocked tank will always be easier to care for, with more stable water quality