I have had a lot of experience w/anemone. I went to a local landscape store and bought an "aquatic plant" mesh baket. The holes are very small. I use it to "quarentine " any new pair or oddly behaving beings that are in my tank. Just clip them to the top/side and the water flow is not deterred. You can then administer any CPR and or TLC needed for your inhabitants w/out disturbing the reef. Sometimes, natural irritants in the rocks badger the anemones. Flat worms, crabs, ect. They will pull their foot and "roll" from the place that they no longer want to live. But, if he is melting, that cannot be good. Check the water for metals and salinity also. That will send them down quickly! Good luck!