I've had guppies and harlequins together, and am imagining neons wouldn't be too much different from harlequins. 6 neons or more... I liked my guppies, but they didn't like me nor my water apparently. Oh, try to get the guppies from the same tank... there were some really odd things going on when I introduced two new guppies into a tank with one guppy who'd been there for a few days (lol, guppy flares), and the little guy who'd been there longer harassed the others badly for a while .
Last edited by JKfish; 10-22-2010 at 10:27 PM.