Flakes, pellets or wafers: which food should you choose for your fish?
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
Choosing a food shape mostly comes down to where your fish swim: flakes for surface species, floating or sinking pellets for mid-water fish, and adhesive wafers for bottom-dwellers. Getting the shape wrong often means the food never reaches the fish it was meant for.
Contents · 6 sections
Why does shape matter more than the brand?
A bottom-dweller like a corydoras will almost never chase a flake floating at the surface; it eventually breaks down and pollutes the water, a mechanism much like the one described in our article on overfeeding. Matching shape to species avoids this silent waste.
When should you choose flakes?
- Surface and mid-water fish: guppies, goldfish and tetras do well on flakes that float, then sink slowly.
- Advantage: easy to dose by eye, with a wide range of formulas for different needs (colour, growth, plant matter).
- Downside: breaks down quickly in water, so give small repeated amounts rather than one generous dose.
When should you prefer pellets or wafers?
Sinking pellets suit mid-water and bottom fish that don’t normally come up to the surface, holding together better in water than flakes. Adhesive wafers, stuck to the glass or laid on the substrate, specifically target bottom feeders like loaches or certain catfish, in the same logic as the species-specific feeding already covered for bettas and goldfish.
Can you mix several shapes in a community tank?
It’s actually recommended as soon as the tank holds species occupying different levels: a flake for the surface and a wafer for the bottom ensures every fish gets access to food without excessive competition. Also vary the diet with live or frozen food once or twice a week for nutritional value.
How do you dose without overfeeding?
Whatever the shape, the rule stays the same: an amount eaten within 2 to 3 minutes, once or twice a day. Uneaten wafers should be removed after a few hours; they dissolve more slowly than flakes and often go unnoticed at the bottom. Find everything you need in our food aisle.
Frequently asked questions
Are pellets more nutritious than flakes?
Not necessarily: composition mainly varies by brand and range, and shape affects distribution zone far more than nutritional value.
Should pellets be soaked before feeding?
For large pellets given to small fish, a brief soak of a few seconds makes them easier to eat and reduces the risk of swelling once swallowed.
Does an uneaten wafer pollute more than a flake?
Generally yes: its compact texture breaks down more slowly and releases organic waste over a longer period if not removed in time.
In our shop, for this use: Programmable automatic aquarium fish feeder (€32.90) · the whole shop
This guide is part of Planète Pets’s Fishkeeping universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.