Toadstool too Lg?

[Whiterabbitrage]

I'd like some advice please. Two years ago I ordered two toadstools. I wanted to compare vendors. Each was described as flourescent green. My question is how large of a toadstool is ok? One of them has grown to 9-10" which makes a nice focal point, but what about chemical warfare? I will be upgrading to a 120 gallon shortly, so maybe they will be ok. Or maybe I should remove the large one just to be safe?
Thank you for your input!

 

[liven learn]

If you have enough room keep it. Don't let it touch anything or get within a few inches. You can also frag it if need be.