When to change nutes... veg to flower? (DWC)

Hey peoples, ive got a girl in a 5gal bubbler bucket. She has been vegging for about a month now (no pics crap camera). Really happy with how she is going, growth rates are amazing... much faster than my soil or coco.

I was wondering... when i switch the light cycle over to 12/12 do i also change the res to flower nutes that same day... or do i leave the veg nutes in for a few days? Ive read that some people mix up a batch of half veg, half flower for the first week or 2 on 12/12, any recommendations? Planning on flipping her in the next day or so.

The minute my lights switch I do a res change and start with a fresh bucket with only flower nutes in it.. Seems to be working nicely for me..I try and time it on a scheduled res change day tho so i dont waste nutes...but sometimes that dont work out cause they grow too fast..I change my nutes every 2 weeks in the buckets and once a week now in the tubs.

many people do it both ways...its kinda what you like yourself...but i change it the day the lights changed...plus i change nutes weekly

Cool, ill be switching her tomorrow then. Was due for a res change.