Step-by-step
Step 1: Stock with multiple females per male1M:2-3F ratio prevents male over-harassing females. Females stress out if only 1 in tank with male.
Step 2: Condition with high-protein dietFeed 2-3x daily with high-quality flake + frozen bloodworms + baby brine. Pregnant females need extra nutrition.
Step 3: Watch for pregnancy signsFemale develops dark "gravid spot" near anal fin. Belly squares off (pregnant) vs round (overfed). Pregnancy lasts 21-30 days.
Step 4: Optional: move to breeder boxFew days before due date, move pregnant female to breeder box (floating divider). Fry drop through slits + escape mom's mouth.
Step 5: Female gives birth to live fryFemale releases 10-100 live fry over 1-6 hours. Fry are fully formed mini-guppies, 0.25 inch long.
Step 6: Remove female after birthMom WILL eat fry within hours of birth. Remove her back to community OR transfer fry to separate tank.
Step 7: Feed fry crushed flake immediatelyFry eat from day 1. Crushed flake + powdered Hikari First Bites + baby brine shrimp 4-6x daily.
Step 8: Grow out 8-12 weeksSale-ready at 1 inch (8-12 weeks). Color develops at 4-6 weeks. Sex determines at 6-8 weeks.
FAQ
How often do guppies breed?
Females give birth every 21-30 days. Sustained for 12-18 months once mature. One female produces 100-500 fry over her lifespan.
Will guppies eat their babies?
YES. Both males and females eat fry within hours of birth. Either separate fry immediately or provide dense plant cover for fry hiding.
How do I sex juvenile guppies?
At 4-8 weeks: males develop gonopodium (modified anal fin), brighter colors, longer fins. Females stay round-bodied with shorter triangular anal fin.