Ive had my single ricordea florida for roughly, 6-7 months now, and its possible quadrupled in size (from about a quarter, to now just freaking huge). Im hoping it decides to move over and drop a couple of babies off soon.
Depends on what kind they are on the size, some stay small like the size of a dime some get bigger.. From my understanding they don't drop off babys they split down the middle or they grow another mouth and split.. Another thing that may depend on the speed of growing is the quality of the water and your lighting