It would be great if it were lymphocystis and went away on its own. lymphocystis is usually caused by stress correct? It was recently introduced to my tank so the stress factor could be the cause.
My guess would be lymphocystis. If I am correct it will go away on its own. Keep an eye on it for any changes.
Thanks for the replies everyone. It grew to double the size yesterday however today has held steady. It's now about the size of a green pea but in the shape of a cone. At some point should I do anything or is wait it out the best answer?