hope I can use your language good enough to be understood.

(This is my first post here at PlanetCatfish-Forum).
I am a long year keeper of Chaca chaca and I already breeded them successfully http://www.welse.net/SEITEN/chacazucht.html.
But now I got two Chaca bankanensis about three or four weeks ago and they don't eat (worms or fish or whatever...)
I dont know how to keep them alive.
I phoned their dealer and they told me, that these Chaca bankanensis are kept in pH 6 - water and that they are feeded (?) successfully with Xiphophorus maculatus.
My Chaca bankanensis are still good looking, moving sometimes, they have pH 6 since one week and they have worms and fishes in different sizes....but they are not interested. If I put a big worm into their tank (which would not reach the ground in a normal Chaca chaca-tank), they move aside as if they feel disturbed from the worm.
Whatelse can I do exept hoping?
B W
Klaus