I bought some pink and green rics from Pablo a while back. Two of them are on the same rock. For a while they didnt grow much and were about the size of a dime or nickel when fully opened. I played around with their placement and eventually left them in a spot on the sand bed. One eventually started growing and is now the size of a quarter to half dollar when fully opened but the other, right next to it on the rock, is still the same small size. Is this a normal occurence? Most rics I've seen in groups are all the same size.