how to stop rtn?

[Nano]

Well its too early to say, but since moving it and trimming it off it seems to be ok. The last one I took the same approach too died with in a few hours. Here's hoping. If it continues to spread I'm just going to cut of more if I can thats healthy.

Sigh. How do you guys do it? All your sps heavy tanks look so beautiful and mine (while new) has just been a head ache some days.