Keep feeding them even while they are splitting. They grow erratic, basically whatever direction the new mouth points it will grow haha.
I have 7 different kinds of candies in my tank, some grow slow, some grow super fast. The kind you show in the pic if the color is correct has about a medium growth rate compared to other types.
Colors of candies I have:
- Neon green
- Purple
- greenish with blue speckles
- purpleish with neon green speckles
- red with green centers
- almost pure white
- Teal
From the pic it looks like it is just starting the process of growing another head. Will get a lot more drastic soon until it forms a whole new head. The each head will split again, split again and so on until you have a monster colony.
They LOVE good calcium, around 450+ & a DKH of around 9-10. Also dose trace elements. Mine really like Inland Seas Biotrace or seachem Reef plus.
When they get large, they suck up calcium and alk like a black hole so make sure you keep doseing!
You can tell when they get ****ed, such as when alk or calcium is low. They will sort of shrivel up and look like a skeleton. They are hard to kill unless your tank is not taken care of. Yours looks pretty happy.