Fish Food
Match the food to where your fish feed and what they eat. Below, food is sorted by form: flakes and pellets, wafers for bottom feeders, frozen and freeze-dried extras, foods for particular fish, and automatic feeders for trips away.
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Flakes & Pellets
Flakes float and sink slowly, suiting fish that feed near the top or in midwater; pellets sink faster and hold together, suiting fish that feed lower down. A good general flake or pellet covers most community fish as the daily staple. Keep food sealed in a cool, dry cupboard and replace opened tubs regularly, because food loses nutrients as it ages.
Wafers for Bottom Feeders
A sinking wafer stays whole on the bottom long enough for slow bottom feeders such as corydoras and plecos to find it. Drop it near where they gather, ideally around lights-out, so faster fish don't steal it. Remove any wafer still uneaten the next day before it fouls the water.
Frozen & Freeze-Dried Foods
Frozen or freeze-dried brine shrimp and bloodworms add protein and variety, and many fish color up when they become a regular treat. Thaw frozen food first; freeze-dried goes straight in. Use them a couple of times a week alongside the staple, not instead of it.
Specialty Diets by Species
Betta pellets run smaller and higher in protein to suit a betta's short digestive tract and carnivorous leanings, cichlid formulas come in both herbivore- and carnivore-leaning versions depending on the species being kept, and goldfish food is formulated with less protein and more digestible fiber than a typical tropical fish diet. Feeding a species-mismatched food won't cause immediate harm, but a dedicated formula supports coloration, digestion, and long-term health better than a generic flake stretched across every tank in the house. Checking a label's stated species focus before buying takes a moment and saves a wasted bag.
Automatic Fish Feeders
An automatic feeder drops a set portion on a timer, handy for routine and for trips away. Most take flakes or small pellets. Test a new feeder for several days while you are home to catch jams, wrong portions or flat batteries, and keep it dry: damp food clumps and stops dispensing. For short trips, healthy adult fish often manage better with no food than with too much.
Feeding Amount & the 2-Minute Rule
Offering only what a tank's fish can finish within about two minutes keeps uneaten food from settling into the substrate, where it breaks down and drives up ammonia far faster than most new owners expect. Overfeeding, not underfeeding, causes the vast majority of cloudy water and algae complaints traced back to a feeding routine, since a healthy fish tolerates a light day far better than a tank tolerates repeated excess food rotting out of sight. Skipping a day here and there causes no harm at all to an otherwise well-fed fish.
Related reading
Frequently asked questions
Feeding routines raise a consistent set of questions.
How much food does a fish tank actually need per feeding?
Only what they finish in a couple of minutes. Anything left after that is too much. Small amounts once or twice a day suit most community tanks.
Is frozen food better than flakes or pellets?
Neither is better on its own. Frozen and freeze-dried foods add variety and protein; flakes and pellets are balanced and convenient. Many keepers use both through the week.
Are automatic feeders reliable enough for a week-long vacation?
A quality automatic feeder handles a week away reasonably well once it's been tested for a few days beforehand to confirm the portion size and timing are dialed in correctly. Running it through a short trial before departure day, instead of trusting it untested, catches a jam or a miscalibrated portion before it matters.