Ace Of Spades
Fish Gatherer
Adam, your tank is too small for angel fish - please don't add any more.I had two angles in a 55 litre tank for three years and they seemed happy and without any problems. But angel fish should be the last addition to a tank because they're territorial.
Opinions, Opinions, Opinions.
54 litres... Off the top of my head, about 15 US galls?
Meaning, the tank probably isn't that tall. Angel fish have the potential to grow quite large and need a deep tank to accommodate them fully, and be housed according to their potential adult size - like all fish. As territorial fish, they also need length to the tank if they are to be kept in numbers.
Opinion? No, not really, just basic measuring skills.
Of course it's an opinion, there are no rules when it comes to stocking a tank, no Aquarium Police, he can put it in if he wants.