hi i have had 4 rbp now for about a year and 3 days ago i upgrade to a bigger tank since then they havent had anything to eat also stick in 1 corner and if they do move they swim up and down all the time to me there not very active at all my temp is at 28c and tested water and that is ok to could someone please help to why they are not active at all at a guess there about 4 inch 
