First, you’ll need to set up a quarantine tank so you can make sure the new ones are healthy. Good quarantine time is 60 days.

Second, you don’t want to put babies in with bigger ones since they might see the babies as food. The will eat anything they can cram into their mouths. Be careful.

Third, I hope you have a HUGE tank to put them in. 4 WTF’s, I would go with the biggest Exo Terra viv they make 90 x 45 x 90 cm.