When i added my stripped raphael to my tank I didn't see it for 3 months afterwards. It was about 1.5" when it was put in the tank, it swam to the bottom and hid in the plans. The next day when i went to feed the fish i didn't see it anywhere. After a few weeks i thought it had died and eaten by my larger pangasius (6-7" at the time). Still no signs of it till one day (about 3 months after) I was moving around some decor and i found it. By this time it had doubled in size and is now about 3.5-4".