Wow them pics are HUUUUUUUUGGGGGGGE! I had to zoom waaaaaaay out to see them!
what lighting are you running on it?
as per your question regarding the barbs and the 10G. No, i Definitely would Not put any back into the 10G tank.....its Way too small for them for any period of time!
from your story im guessing the tank is brand new set up and had all them fish put right into it? That would concern me a little as the tank hasnt had any time to establish the bacteria needed to keep your ammonia, nitrite and nitrate levels in check. Are yopu testing for these btw? What are the numbers?
Added to which you have no live plants in the tank to help with these, only plastic from what i can see, and so i would be even more concerned.
You can help this along btw if you grab some gravel from the 10G, put it into ladies tights, and put this in the 55G as it lives in/on surfaces etc within the tank and this will help boost the growth of it in new tank.
I cant guess on fish compatability etc from what you've got as cichlids really aren't my thing, but i would defo want to find out what the 2 unknown fish are, and consider in the future NOT getting fish you dont even know the names of, never mind the needs!
Added to the above, are you aware of your water parameters with regards to ph, gh and kh? these are very relevant when deciding upon stocking your tank, as different fish need different types of water in order to maintain long term health.
films Dl'd now........good luck.......and post us as much info as you can!
Oh, and more normal sized pictures!