You hit some of the questions about my shrooms on the nose. Have replaced two of my actinics, two more are waiting. I pay 40 bucks for each light here and am waiting for next month to replace them I was given misinfo.. on them whenfirst using them. We were told they last longer than other lights, over a year. Have found out through these forums that in fact they only last 7-8 months! Very upset about that. Two lights are old, and yes the rock the hairy is on does get a lot of movement. The rock is so large and difficult to place but I love the mushroom and must figure out a better place. Have the intake water turned for the most flow throughout , so can't change that or red slime sets in where there is not enough flow. The chemistry is fine. Do have a phosphate rise all the time due to our well water. But have had the hairy mushroom for 3 years. Back to lights; in ordering them through the mail, one always comes in broken so that is a bit discouraging. They are cheaper that way. An RO system is out of the question. Too expensive right now. Have had my tank for almost ten years. Like you I love mushrooms and your purple ones are gorgeous! To put some on the floor of the tank will have to do some moving around. The plate coral is so huge that it takes up most of the space at bottom. So, I will change those lights sooner than later. Thanks for your time in answering my letters.