no camera lol. The only way i would feed feeders was if I treated the parents with prazi and then bred them myself and inject B1 into them. But thats a total waste of money and time.
I have seen large arowana kill oscars. They could quickly dispatch Discus. I assume you are doing this "temporarily" and not letting the aro get full grown in a 100? Your 100 is 60 X 18 right? The aro can easily attain 36 inches some get into the 40s captive. In the wild I think they can hit 48". But he needs to turn and a 100 is only 18 inches. Someday I'll get an aro but I need a bigger tank