Nick is correct that anemone is probably not going to make it. Your tank is not stable enough and the anemone is not in the best health. Collectors will stick them in the dark as they sell much better white than when they are tan/cream as they should be.
Wow! I would love to see a pic of it now it is all settled in and doing well.
But an new tank is a new tank doesn't matter how many you have had. It takes 1.5 to 2yrs for a tank to mature and 6-8 month to be stable enough to safely put an anemone in. Do people do it and get away with it? Sure. But depending on how you look at the livestock in your tank depends on what risks you are willing to take.
Definitely looks like it is recovering!
Love the scooter blenny, does he eat pellets/frozen?
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