I dont touch anything unless i accidently break something off while scraping the glass or doing a water change and just place the frag in in antoher part of the tank to see if it grows differently; which they definitly do color, growth, etc.. Not really, some kill others, but the not completely and just merge together, so no total kill off of one or the other.
Yeah, so i guess no rose bubble?? Though when i got back from the Frag Fest i noticed my clowns laid eggs on the front glass!! So... we'll see:)