Hello I was in my LFS the other day chattin to one of the blokes who was askin if I had thought of live food sources.... off I went on my proposed colonies in the sump etc etc.... He mention that the river thames (5 mins walk from mine) is full of chinese mitten crabs which came over on the boats many moons ago and have established themselves. Turn over a few rockss when the tides out an your laughin!!! Now then......I reckon theres a good chance of disease in there??? but not sure and think would i be askin for trouble in puttin them in my tank as food. Also would these be marine or fresh water dependant? its a tidal river, but there is loads of monster carp etc in there. The fella in the shop wasnt sure about marine etc an said he was thinkin of takin a couple of em into the shop an puttin em in a tank to see how they do. Rather him than me. But I fear that could take forever for him to do...(will have to pester him on that!) any thoughts? Nice one.