Bubble algae on trachy

[woochi]

I've had this guy for quite a while and he always looks really good, it may look kind of bad in the picture but he does this every night and you can see the bubble algae that's been on there since I've gotten it. should I do anything or leave it be

 

[julian]

next time you do water change just suck it off try not to break it they say it spreads but i have done it in the past nothing to worry about