Hi, I've had a community tank running for just over a year and one of the early species in there were 3 pearl Gouramies. 1 male 2 female. Just over a week ago they started hiding all in separate areas. Pretty much as far away from each other as possible and out of sight. The last additions to the tank were 5 silver hatchet fish which have been in the tank for well over a month. All other fish in the tank seem fine, good colouration and very active. Has anyone any idea why the Gouramies have got shy all of a sudden. Thanks for any ideas