Best Fish for a Planted Aquarium

The best fish for a planted aquarium are the ones that show off the scape without eating it or digging it up. That rules out a few popular species and points firmly towards small, peaceful shoaling fish that move through the plants in a group rather than tearing at them.

Shoaling Fish That Suit a Scape

Small tetras are the classic choice: neon and cardinal tetra, ember tetra, and rummynose all shoal tightly and light up against green foliage. Among rasboras, the harlequin and the tiny chili rasbora do the same, and the celestial pearl danio is a jewel for a nano tank. The key is numbers: these fish feel safe and behave naturally only in a group of at least six, ideally more, when they shoal instead of hiding.

The Useful Bottom-Dwellers

Corydoras catfish work the substrate in friendly groups and add life to the lower third of the tank, and they too want to be kept in numbers. Otocinclus are the gentlest algae grazers you can add, quietly cleaning leaves and glass without touching healthy plants, though they need a mature tank with enough biofilm to eat. Freshwater shrimp such as Neocaridina and Amano round out the cleanup crew and are safe with all of the above.

What to Leave Out

Avoid the diggers and plant-eaters. Goldfish, silver dollars, and many larger cichlids either uproot carpets or graze plants to stumps. Big or boisterous fish also stress small shoalers. If you want a centrepiece, a single betta or a pair of dwarf gouramis suits a calm, well-planted tank, but pair them only with peaceful tankmates.

The Bottom Line

Build the stocking around one or two shoals of small tetras or rasboras in groups of six or more, add corydoras and Otocinclus for the bottom and the algae, and finish with shrimp. Skip the diggers and the plant-eaters, and the fish become part of the scape rather than a threat to it.