Woow, what a nice Ancient Rome set-up u hv there.Ur oscar will sure enjoying re-scaping for his own choice later.
OMG,
U r not kidding right add guppies with Oscar,surely end up in a delicious snack.I think the sad tragedy oledi happen
.
IMO,
Removed the oscar immediately and keep a communities is advisable.Good luck with ur find
.cheers.