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How to breed livebearing tropical fish
Select the species you would like to breed.
Several varieties of livebearers are available from most pet stores, including guppies, platies, mollies, swordtails, and endlers. All of these have similar needs.
Whichever variety you select, ask for a 50/50 mix of males and females. Livebearers will do well in a standard 20-30 gallon tank setup.