it's (he or she?) very cute. sure a good buy.
i suggest you get another 1 to partner it.....
if you want it to grow faster...better keep it in pond, or tank.
add duckweed to their menu..once on twice a week..also bloodworm.
clean water is a MUST, regular water change is the answer!!!
do not overcrowd the space (aquarium/tank/pond)