Just a quick update..
Its been almost 4 weeks with the little Harlequins in QT, no issues whats so ever. Perfectly healthy and happy. (Still want to get 3 more females though to spread the boy's attentions a bit more. They aren't TOO bad, Just want to give the ladies a break ^,^).
That is.. Until last night, 2 days shy of 4 weeks, the heater in that tank decided to stop working (It's a brand new heater too, maybe less than 2 weeks old). I'm glad I'm paranoid about checking my thermometers. The water temp. started dropping and fast. So around 1:00 AM last night I sat there acclimating the Harleys for the big tank. They weren't happy campers.
That being said, woke up this morning and they seemed to have settled back down a bit. Lots of exploring though it looks like. They look so small in a 55 =)
Going to get a new heater, do a thorough cleaning of the quarantine tank, and work on getting my next group of fish. I'm thinking the Cardinals are next, That's if I can find them on the smaller side/juvenile-ish, I'd prefer not to start off with the "Jumbo" ones that everyone carries. Possibly 3 female Harlequins as well.