03-02-2011, 12:09 AM
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1. 6-8 is fine. Your tank can handle up to 10 but you will need backups in case they start pairing off as they grow. Breeding pairs tend to terrorize other angels.
2. Young angels do school but as adults, some become solitary, some pair off, the rest still group around if they don't feel secure with their surroundings.
3. I like double blacks most although they're extremely delicate in some instances. Golds, pearlscale, blushing, koi, marble, zebra and even Pinoy angels (developed by fellow countryman, Ken Kennedy) work. It's up to you which one you like.