thanks for the id'ing of the fish iv kept fish before i had angels with other things so if i was to go out and buy the ones you named would they be ok together and how many would you reccomend in a 50 us gallon tank i wont be buying the fish from the tank in the picture i just want fish like that

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(Thanks kj for the vote of confidence though). However, I have kept p.acei for almost 3 years now, and all four are at least 6", the largest male is a little over 7". So, I will have to disagree with your book.