Two condy's in my tank for a few months now. My Clarkii likes the purple one, but will go over and play in the other one sometimes. It will also take extra food, cut up peices of fish, and give it to the condy. I have feed the condy a number of times, and the clarkii will pick at, or sometimes eat the food while the condy holds it. No problems yet.
Both condy's will be going into a friends tank soon. I have already noticed a good amount of growth in both condys, and both look very happy. The purple one found a rock, latched on, and has only made a trip around the rock once. Mainly because the clarkii keeps digging a hole under the condy.
The white condy moves back and forth about 4 inches about 1 a week. Same places, just moves between them. And one spot is actually shaded, and this tank does not have that much light yet.