I recently received two very timid Jack Dempsey's, the smaller is 3 inches the larger 5 inches I have them alone in an established 75. I hope two breed them at a later date so I do not want to add dither or any other fish that would interfere with breeding but these fish hide all day. they have several caves and lots of driftwood, the tank is planted and both fish have very healthy apatites and are overall very healthy. They were in a freinds fish room and had peace and quit all day and now are in a display tank in the dining room in a house of 8 people. Is there anything I can do to make them more "active" ?