I don't want to come off harsh but there are some things you should know.
1. I have seen your LTA and it has been mistreated badly before you bought it. The white color tells me it has been subjected to dangerous temperatures or other bad conditions, causing it to bleach or turn white. This also means that it cannot process light like most anemones and corals, because the white color means it has expelled the brown algae it uses to process light.
2. After it was bleached, it was most likely dyed. I say this because it looks to have blue in it as well, and that is not a natural color for LTAs. I could be wrong about this, but it looks blue in the pics.
3. As a rule of thumb, it is risky to add an anemone to a tank less than 6 months old, because they are very sensitive to momentary swings in many tank parameters. When I went looking for your old thread to look at your LTA again, I noticed your tank has only been set up for 3 months.
These 3 things combined lead me to believe that your anemone came to you nearing death's door, and though it doesn't look it, is barely hanging on. I would suggest weekly 10-20% water changes and try to feed the anemone a very small piece of raw shrimp or scallop. Since it isn't getting food from the lights it will need another source until it recovers. If you can keep the water clean and the anemone will eat, you will be headed in the right direction, but given the above, that may not save it. Not being mean but I thought you should know.