I've had this green cabbage leather for a few months. It developed 2 holes in the middle. Now one of the holes is covered over in rust color. I dipped it in coral rx last week and for 1 day I couldn't see the rust color anymore, however it came back. Any idea what this is and how I can help the coral? I also found a type of worm thing under it when I dipped it. I cut it out. Pics attached




When I pulled the cabbage out of the water, the worm thing came out on it's own from a soft tube, not a hard one, and I just clipped it off with small scissors




