Thanks for the reply. Just to give you an update: my blue spot arrived on sat and has proceeded to build some kind of mansion..heheh. So far he's got 3 entrances and he pops his head out every few minutes. The maroon has paid no attention to him whatsoever. Also if I may ask you a couple more questions:
when I feed he pops his head out and looks really interested but doesn't go after the food. He doesn't really have any competition from the maroon because he feeds from much higher up, and as I mentioned so far the maroon has paid no attention to the blue spot whatso ever. Until he gets a bit more brave, should I do something to make sure he's getting enough food?? Also, as your article mentioned I have lots of building material in the tank for him but it's spread through out the front of the tank. Should I put some closer to his home or will he go out and retrieve what he wants? Thanks again for your help.
Wendy