I don't think your fish died because of not using a cannister. Not sure how that would cause fish to die. From your previous post...
All my fishes dying :(
... sounds like your fish died from ich.
And if that's the case, your tank needs to remain fishless for 6-8 weeks to let the life cycle of the ich parasite run its course. If you put fish in before 6 weeks, the ich will still be in the tank and will infect your new fish - even if you quarantine them. Best to wait a couple months before introducing any new fish in there.
Regarding 4x dwarf angels, I'm no angel expert but I think you may have some aggression issues between all of them, even in a 150g. But let's see what others that keep them say about it.