Hello all. In my 20 gallon long I recently changed substrate from dark to light and re-scaped everything. After rescaping all my fish were very timid even weeks afterwards. My peacock gudgeons who used to roam all over now hid under driftwood all day. My harlequin rasboras stayed in one spot under the overhanging jungle val, my dwarf gourami stayed in thick planted areas. I only had 2 peppered corys at the time due to losing 6 of them from previous substrate problems. Yesterday I added 6 more pepperred corys who were immediately active and foraging everywhere. Within MINUTES all my other fish's old personalities came back! the Harlequins were zipping around, my gudgeons were all over the place and my D.G. was roaming the whole tank. I have to think that just seeing these new corys swim all over not worried about anything convinced everyone else it's ok to come out. So....if you have shy fish problems look into a dither species!...which i did not realize cory cats could be.