thanks - am keeping a very close eye on them as they were very stressed when I bought them. They have both developed a much richer colour in the last few days. Have been feeding bloodworms, daphnia, brine shrimp and spirulena pellets (they're not much interested in the flake foods) They really do seem to like all the hidey holes that are in the tank and come out and play in the current from the filters.
sue