can i put a chiclid with these fish?

Cray fish will eat any and all of your fish if they get a hold of them. They are real little terrors.

I would say you shouldn't get anymore cichlids, tiger barbs would pick on anything like an angel and any other cichlids would pick/be picked on by your rams.

Wht is your Ph like?

You maybe could do another pair of dwarfs like some sort of apisto.

id agree your tank is good. any fancy small fish will be picked on by the barbs, and there will be aggresion between your rams and any other smallish cichlids you put in there. sound like you need another tank in the house to me! look in the paper and get a 55, then youve got a pile of fish you can add to it.

if you really had to add some fish id say stick with lower level ones. some cories, kuhils, small pleco, bristlenose cat, hillstream loach, amano shrimp. those would have their own tank niche to hang out in.