lando, i not any problem with your answer and somehow figured that your response was that of following what some book said
You need to know that all these books and on line with any information for an aquarium size for any marine species, they not done this themselves to have a first hand knowledge other then their books and the basics if you understand my meaning. It is just like fenner advise site, i see so many mistakes going by him and he not once said that that person will have need for a larger tank.
I mean god, he once told this one guy in answer to his question, "What size tank he would least need for a full grown leopard shark." His answer was stunning, he answered with that a 500 gal
tank would do fine or better yet that he would need a 500 gal
tank. The thing is, a good number of these who writes these books not have any aquariums of their own. For i was told by one i know who knows Fenner himself and said he not have any tanks.
Yes, there are some great books out there but when it come to a F/O tank, to have any large angelfish in any tank under 300 gals is suicide, for they need huge amounts of swimming space. It was just like in another forum site, this person said that angelfishes have a bad survival rate in home aquariums. I will give you a far better understanding in that, i know of a doctor at his office, he has a pair of large French angelfishes in a 500 gal
tank for little more then two years now. And if that doctor was to wanted and go cheeper on the tank size, like perhaps a 300, they not be alive today. The only true people who can answer a good many questions are the ones who done this in keeping any large marine animal in too small a tank.
What all who wishes too keep any large marine animal should look at who is doing this at a minimum to no loses for these fish just not live just a few years and so many times i hear they died
or just that any tank mates they house together with them.