Ever since i took my three large tinfoil barbs out of my 240l tank and replaced them with four small silver sharks my five clown loaches have gone into hiding.before this they never hid. it has been three weeks now and still no sign of them during the day. as soon as the lights go off my largest clown (6") comes out ,then followed by the other four, in the hunt for food, they seem happy enough and there colours are nice and bright. could it be that at first they were sulking about the loss or even the new additions to the tank and now they have just got used to sleeping during the day. has anyone else experianced this sort of thing with there clowns, i know that clowns do strange things like lay on there sides and hide for days on end, but this seems to be going on for a long time now.