The Secret to Huge Fry: Best Food for Guppy Fry Growth (Stop Using Flakes)

If you walk into a fish shop and ask, “What should I feed my baby guppies?”, the standard answer is usually:

“Just crush the adult flakes into powder.”

This is why most home-bred guppies end up small, slow, and dull-colored.

While crushed flakes will keep them alive, it won’t make them thrive.

If you want guppy fry that reach adulthood in 3 months instead of 6, you need to treat them like bodybuilders. They don’t need “snacks”; they need Protein and Fat.

Here are the 3 best foods to explode your fry growth, ranked from “Good” to “Legendary.”

1. The “Lazy” Pro Choice: Decapsulated Brine Shrimp

If you have a job and can’t spend hours hatching eggs, this is your secret weapon.

“Decapsulated” means the hard shell of the shrimp egg has been chemically removed.

• Why it wins: It is 100% pure protein yolk. You don’t need to hatch it. You just feed it directly from the jar.
• The Result: Fry grow visibly fatter within 2 days. The high fat content powers their rapid metabolism.

2. The Malaysian Classic: Moina (Kutu Air)

In the West, they use Daphnia. In Malaysia, we have something better: Moina.

You can buy a bag of live Moina at the LFS for RM2 – RM3.

• Why it wins: It is Live Food. The movement triggers the fry’s hunting instinct. They will eat until their bellies are literally bulging pink.
• The Risk: Live Moina dies quickly (usually within 24 hours). You have to buy it fresh or culture it yourself. If you feed dead/rotten Moina, you will crash your tank with ammonia.

3. The “Gold Standard”: Live Baby Brine Shrimp (BBS)

Ask any Grand Champion guppy breeder what they use, and the answer is always BBS.

Hatching your own Artemia (Brine Shrimp) is a hassle, but the results are undeniable.

• Why it wins: It is the cleanest, most nutrient-dense food on the planet. It triggers massive growth spurts and enhances color early on.
• The “Hack”: In Malaysia, because our weather is warm, you don’t need a heater to hatch them. Just a bottle, salt water, an air pump, and 24 hours on your balcony.

The “Power Feeding” Schedule

The food matters, but the frequency matters more.

Guppy fry have stomachs the size of a pinhead. They empty their stomach every 20–30 minutes.

• The Amateur Way: Feed a big pile of powder once a day. (Result: Dirty water, hungry fish).
• The Pro Way: Feed tiny “micro-meals” 4 to 6 times a day.

The “Working Person’s” Schedule:

1. 7:00 AM: Decapsulated Shrimp (High Energy for the day).
2. 6:00 PM: Live Moina or BBS (The big meal).
3. 10:00 PM: Crushed high-quality pellets (Slow digestion for the night).

What About Egg Yolk? (The Old School Myth)

You might read online about feeding boiled egg yolk.

Don’t do it.

Yes, it has protein. But it dissolves into a cloudy mess instantly. Unless you plan to do a 100% water change an hour later, egg yolk is the fastest way to kill your fry with an ammonia spike. Stick to Brine Shrimp.

Summary: The Growth Tier List

Final Verdict

If you want big guppies, you have to invest in big food.

Stop crushing the RM5 flake bottle. Spend the extra RM15 on a jar of Decapsulated Brine Shrimp. Your fry will double in size in two weeks, and you will never go back to powder again.