The pictures are not very clear... But don't celestials need to have upturned eyes? I cannot tell...He has no dorsal fin wicj matches. o.O
Anyway. Ya, your tank does look overstocked. A slight upgrade (10 more gallons) would give them so much more space!
>_> You could always do like 30 more gallons and get them another lifelong buddy, though!

Your orangy is a very unique looking fish! I like him.
edit:
O_o
I just noticed the little fish in the very very back. And another at the bottom and another up top. D: Forget the lifelong buddy, you really do need an ugrade if this is what they're kept in normally. ]: Say another 40 gallons to the ten, so a total of 50 if you want them all in the same tank.
Rubbermaids are great temps, imo!! I use them a lot. Especially as hospital tanks.