woah...
Am i the only one that sees some problems here?
First off, that nano is beautiful, but in no way suitable for 3 angels, especially two large angels. They need more swimming space than that, and they have a lot more growing to do...
And a lionfish with perculas? They will become lunch once he's able to get his mouth around em. Or he'll try it before he's big enough, choke on them, and die. I would seriously think about re-evaluating your stocking situation.
Just my $0.02.