I wouldn't be concerned about the bubble tips as a sign of health either as long as it grows. Mine in my 75g were growing and splitting like mad and never did they have bubble tips.
I moved the same anemone to my 29g and now it has bubble tips, the flow is much lower than it was in the 75g which leads me to believe current might have something to do with it. I doubt they bubble tip in lower quality water, but I don't think anyone really knows for sure as I've also read online of people who've had their anemone start bubble tipping when the lights were increased, so that might also have something to do with it.
Perhaps when water conditions are ideal it happens too. I don't think any real studies have been done on the subject, so anything out there is just anecdotal.