hi wayne
congrats m8
yeah they do look like little tadpoles
when they have all hatched its best to move them to a bigger container .
old rectangle ice cream tubs are ideal with an air stone about 2 inch down from the top so it doesnt chuck them about.
or you could move them into the bigger tub strait away as they hatch as i used to useing the pipets you get out your meds just widen the end abit useing a nail. suck them up with it iv found its sound for moveing them as there hatching and you can count them aswell when theres loads this way lol.
when you start feeding them do 2 water changes a day about 25% to start with working up to 50% with the same water temp takeing out any uneated foods and keep the sides and bottom clean as there prone to bactarial deasese stick to that routeen mate and you carnt go far wrong you may loose a couple on the way but most should survive
good luck with raiseing them wayne