Margolis wrote:
schooling fish stay in a tight "military" style precise formation. There
are no "schooling" fish in the aquarium hobby that I know of. Things like
tetras that are called "schooling" are actually in a shoal. A shoal is a
social formation of fish also, but it is looser. Some fish may be facing
left, some right. Some looking down. In schools, all fish face the same
direction and move in precise unison, as if they are just one big fish.

and with your ph, you should be able to keep just about any fish you want
with no problems.

I did have a group of 4 harlequin rasboras once that showed the true
schooling behavior you're describing a lot of the time. I don't know
whether this is unusual for harlequins, but it sure was cool to watch.

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__ Elaine T __
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