It is the normal mana pool, and yes it shows mana.It needs to be noted that a single mana burst will not be enough to change the indicated level of mana in a mana pool. Even several bursts will not show a change in the pools level due to just how much mana a pool can actually hold, and how small of an amount of mana is actually sent out in a mana burst, in comparison.
I am also guessing you are talking about the full mana pool, not the diluted mana pool?
Also, is the pool showing any mana in it at all? If not, then there is something else going on here.