I ha e recently aquired a frag of garf bonsai from another reefer in a trade. I saw when I got home that it had 2 spots of rtn when I got home. This was about 2 weeks ago when I received it. The spots were tiny when I got it but now they are half the size of my pinky nail. Does anyone have a known solution to rtn or is this going to be a wait it out and see if it stops kind of thing?