I have had these mushrooms in my tank since April. I have noticed a difference in the size of the mushrooms and have been watching them very closley. It seems to me that they are happy but yet they continue to get smaller. I have many other inhabitants in the tank including but not limited to ricordia, button polyps, and hairy mushrooms. Please tell me what you think might be the problem. I am afraid that at this rate I will not have green mushrooms in my tank for much longer.