Guppy Care Guide — The Perfect Beginner Fish

Guppies are the most popular freshwater fish in the world — and for good reason. Males are spectacularly colored with flowing fantails in every color imaginable. They're hardy, peaceful, breed easily, and eat almost anything. Here's how to keep them at their absolute best.

Tank requirements

Minimum tank: 10 gallons for a small group. Temperature: 72-82°F. pH: 6.8-7.8. Guppies tolerate a wide range of conditions — one of the reasons they're so beginner-friendly. They prefer hard, slightly alkaline water similar to their Caribbean origin.

Male to female ratio

If you keep males and females together, guppies will breed constantly. Females can store sperm and produce fry every 28 days. To avoid population explosion: keep all males (colorful, no breeding), or keep a 1:3 male-to-female ratio and prepare for fry. Guppy fry are tiny and mostly eaten by adults unless you have dense plants.

Feeding guppies

Guppies eat anything — flake food, micro pellets, frozen brine shrimp, daphnia, bloodworms. Variety improves health and color. Feed twice daily, small amounts. High-quality food makes a visible difference in fin length and color intensity in males.

Common guppy problems

Fin rot: bacterial infection causing ragged fins. Caused by poor water quality — do water changes, treat with Seachem ParaGuard. Wasting disease: fish thin despite eating, caused by internal parasites — treat with Seachem MetroPlex in food. Bent spine: genetic in some fancy guppies, not contagious. Drop disease: pinecone-like appearance of scales — usually fatal, quarantine immediately.