RBTA flow and bubbles

[5Bucks]

My RBTA was very bubbly when purchased a year ago. When placed in my DT bubbles faded in a few weeks. It's always been in relative hi flow area. Moved it to lower flow area about a week ago. Now, looks like some bubbles starting to come back for 1st time in a year. In my observations seems bubbly bubble tips in other tanks are usually in less flowy areas.

 

[Fieryfrog]

That is funny. Because mine are the same. But after I frag them, they bubble for a while and then start losing the bubbles again.