i bought some feeder guppies for my pirahna and i think 2 of them were pregnant. they are really fat and have a dark spot right before its tail. i was wondering what i have to do for them when they start having babies.
Get a breeding net for the fry and put one female guppy in each one 2 nets if you got 2 preg females and take out the females as soon as they finish having the fry or they will eat them.
If they're as large as you give them credit for being then I suggest you prepare another fish tank known as a breeding tank or a breeding net for the mother and her babies...