31st oct, sowed seeds, under 6400k 160w
20th nov, grafted to pereskiopsis, stock all shared a tray of plain moler
25th nov, feed @100%
12th dec, feed @100%
22nd dec, grafts potted up seperately into 2" pots, mix of moler and compost 50/50
03rd jan, feed @100%
15th jan, feed @100%
30th jan,  feed @50% plus some added miracle grow for a N hit. :eek:
07th feb, feed @100%
>somewhere here I raised them up to closer to the bulb, to within a few inches
13th feb, feed @100%
21st feb, feed @100%
03rd mar, changed to 6400k 85w due to dead bulb, temporary measure
08th mar, changed to 5500k 150w, buds sighted

My ferts are 8-34-32 + trace elements.
Light cycle is 15/9.
Temp in the box peaks @35C (well, last time I checked!) and drops to 15-20C when the light is off.
Between feeds, they recieved plain, warm water, a good soaking each time so no build up.
Very few pups have had to be removed, 4 out of 8 have tried to pup, and I think they have kept quite nice shape for grafts being pushed.
Maybe I over did the feeding, and certainly wouldn't feed a mature cactus in this fashion, but nothing averse has happened yet.. just having fun with them!