Is this overcrowded

Oh boy I didn't understand how the thread was sent before finishing it!

Anyway I am thinking of adding some more fish:

3 more neons
4-6 serpae tetras
4 black widow tetras
1 xiphophorus

Do you thing this population would be too much for the capacity of my tank? Or do you see any problem with the combinations?
Thanx!
 
Your ok now IMHO
youir mix of fish is a bit off but if its working go with the new fish.
I would sugest a pair of dwarf cichlids like rams instead of one of those schools.
 
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