How do I ask for a refill for my acrylic nails? I like having pretty acrylic nails:



Roughly once a month, I need to get a refill.  (Basically, they take the color off, and fill in the part of the nail where it's grown out, and paint them again.)

In my last visit to China, I attempted to get a refill, except (a) my Chinese didn't seem up to the task (I typically listen to intermediate level on ChinesePod, but this is a specialized topic), and (b) the lady didn't seem to have the appropriate equipment.  I managed to get my nails done, but it wasn't the same as what I've had previously in Western countries (instead, they just painted over them).

Question: How can I ask for a nail refill?

I've just learned the words 假指甲 (fake nails) and 美甲 (manicure).  But I suspect a translation of "refill" will not give me what I'm after.
Refill 修补

Saw this talking about gel nails, but the concept should be the same:

H.K. Gel Nails F&amp;Q


  ...要注意在啫喱甲Refill(修补)过程中...


Edit: I have a hunch that acrylic nails are called 水晶甲 but I could very well be wrong....