#1 the bottom of the pond, to keep it off the floor
#2,3,3 set up
#5, 6 the walls are up
#7 the insulation in each wall frame
#8,9 my pacu
#10 big pacu next to a 12" oscar
good god and i thought my pacu was big. i recently went to washington d.c. and the national zoo has some arapimas (not sure if i spelled that right) and a bunch of 2-3 foot pacu. yours look almost like the ones i saw!