My carpet needs to be fed weekly, about 1 31-40 ct shrimp soaked in selcon. It only likes low light, as in 130 total pc watts on a 135. I have a window next to the tank and as the seasons change and leaves fall off trees in the winter, I can get direct sunlight into the tank and even with the gradual light addition over weeks, it doesn't like it. It gets smaller and stopped being sticky so I had to keep the blinds closed. Much happier and sticky as can be and expands out again.