How Much to Feed a Betta Fish Guide: Pellet Count Per Day
The single most common reason a betta dies in its first year is overfeeding, not under. Hobbyists treat that little fish like a hungry puppy when its stomach is the size of one of its own eyes. The correct figure for how much to feed betta fish is two to four high-quality pellets per day, sized to the fish’s body, fed once or split across two sittings. This guide from Gensou Aquascaping at 5 Everton Park works through pellet counts, body-size matching, and the fasting day that prevents bloat in our tropical climate.
The Quick Answer: 2-4 Pellets Daily
Two to four pellets per day, total. Most premium pellets — Hikari Betta Bio-Gold, Fluval Bug Bites Betta, Omega One Betta Buffet — are sized so a betta’s stomach holds three to four comfortably. Bigger does not mean better; if the pellets are larger than the fish’s eye, you are stretching the gut beyond capacity and inviting constipation. Stick to small or micro-pellet sizes from the betta food range.
The Eye-Size Rule
A betta’s stomach is roughly the size of its eyeball. Lay one pellet on the glass next to the fish and compare diameters. If the pellet is bigger than the eye, you are overfeeding even at a count of two. Premium brands list pellet diameter on the tin — anything between 1.0 and 1.5 mm suits a typical adult betta. Larger 2 mm pellets are sized for community fish, not bettas, despite the marketing.
Once a Day or Twice?
Both work. One feed of three to four pellets in the evening matches the betta’s natural dusk-feeding rhythm. Two smaller feeds of two pellets each (morning and evening) reduce digestive load and suit fish that bloat easily on dry food. Avoid mid-afternoon feeding when tank temperatures peak at 30°C+ in HDB flats — heat slows digestion and uneaten food fouls faster. The sinking pellets range includes options for slow eaters who miss floating food.
Fasting Day: Once a Week
One day per week with no food at all. This is not cruelty — it is essential maintenance. A 24-hour fast lets the betta clear its gut of any partially digested food, preventing the bacterial overgrowth that causes swim bladder disorder. Pick a fixed day (Sundays work for most hobbyists) so the schedule sticks. Fish do not get hungrier on day two — their metabolism adapts immediately to the gap.
Frozen and Live Treats
Replace pellets with frozen bloodworm, daphnia or brine shrimp two to three times a week for variety. Two to three bloodworms equals one feed; eight to ten daphnia equals one feed. Daphnia is the softest, most digestible option and often clears mild constipation on its own. Source from the fish food range or the frozen-cube freezers at C328 and Iwarna in Singapore at SGD 5-8 per blister.
Reading the Belly
Watch the betta from above immediately after feeding. A correctly fed fish shows a subtle rounded belly that fades within four hours. If the belly stays distended past 24 hours, you have overfed. If you can see ribs or a sunken outline behind the gills, you have underfed. The visual check beats any pellet-counting rule because metabolism varies between individuals — male halfmoons in warm tanks burn more than female plakats in cooler ones.
Babies and Juveniles Eat More
Fry under three months need three to four feedings per day of much smaller portions — micro pellets, baby brine shrimp, or crushed flake. Their growth window closes by month four, and underfeeding now permanently stunts size. Once the fish hits 3 cm body length and visible adult colouration, switch to the standard adult schedule. Fry food sits in the fish food and feeding aisle next to standard pellets.
Singapore Climate Adjustments
Warm tank temperatures (28-30°C in unconditioned HDB rooms) raise metabolism slightly, which means a betta in a 30°C tank does process food a little faster than one at 26°C. The difference is real but small — do not jump from three pellets to five just because the tank runs warm. If you keep the tank in an aircon room and the temperature swings drop below 24°C overnight, scale back to two pellets per feed because cold gut motility slows considerably.
Holiday Feeding
A healthy adult betta survives 7-10 days without food. Skip the auto-feeders that dump pellets every six hours — they always overfeed. For trips longer than 10 days, ask a neighbour to feed three pellets every other day, or pre-portion a weekly pill organiser so the sitter cannot freelance. The SUNSUN AK-32 food timer works if calibrated tight to one or two pellets per dispense.
Common Overfeeding Signs
Cloudy water within 48 hours of a feed, ammonia spikes on test strips, a layer of brown mulm forming on the substrate, and a betta that floats sideways or refuses to eat — all classic overfeeding signals. Fast for two days, halve the portion when you resume, and the symptoms usually clear within a week.
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