Yesterday, I went to the Waterbom in Tuban.
Prices as of yesterday were:
Adult foreigner Rp 285,200
Child foreigner Rp 174,800
Adult local Rp 168,000
Child local Rp 121,600
The above prices reflect a 20% discount available only at Waterbom, due to four of the rides being closed - Macaroni, two jungle rides and Raft River. They claim that the new rides will open in April, including Constrictor, but I cannot see that happening in April.