Anemone Splitting Help

[Drfu]

Some background, i purchased privately a rock flower anemone about a month or so ago. Its been great, nice colouring and no issues with it moving around at all until last week. It decided to go under a rock structure where i have a sun coral and a powerhead. After it staying their for a couple of days i kinda panicked as i have heard horror stories of anemones jumping into powerheads! I used an ice cube and my tweezers and moved him back. Its been fine for the last week when i noticed yesterday that their is a little one attached to the rock where it was before!

My question is this, a friend wants him, is it save to detach and give away or does it need time to grow first? Don't want to hurt the little guy!