Hi. I have a 4 ft long 55 gal tank, housing 2 honey red gouramis, 3 small clown loaches, and 6 celestial pearl danios (locally bred, not wild caught, for those concerned about this species). In a couple of weeks I am planning to put in one more kind of fish, and I've decided on cherry barbs. This time, when I buy new fish, I'll do it right and quarantine them. My QT tank is a 2 ft long 20 gal. My question for everyone is twofold: How many cherry barbs can I fit in my 55? And can all these fish fit in the QT tank? If not, what's the maximum amount I should buy at once based on the size of the QT? I was planning on quarantining them for 2 weeks. Thank you!