Bubble tip question

[tikka270]

I got a green bubble tip 3 weeks ago I have a pair of clowns that love it and it seems to be very happy with the exception of it doesn't "bubble" up in tentacles.
Lights are brand new bulbs vhos 300 watts on each side of tank.
Water parameters are right where they should be.
the nem eats with no problem also. I am not extremely worried about it since it looks very healthy and happy but just wondered if there was anything someone knew.
Thank you for your time

 

[risin]

It's a mystery. Sometimes they bubble sometimes they don't. There are a lot of theories but nobody knows why. My personal theory is that a certain level of agitation/stress will make them bubble up. When mine split, which looks stressful, they bubble up for a while.