Day 2...new Pac Man frog...need some advice.

[Mentat]

Pacmans do burry themselves; that is normal. But if frog is stressed it might stop feeding. A 10G tank will usually stress out a frog smaller than 3.5 to 4 in. Maybe want to try moving him to a smaller plastic keeper (i.e. ExoTerra's small Breeding Box for babies) and place the keeper inside the 10 gal. for environmental parameter control. Good luck !