Split tail on my clown fish
Hello, we have a new saltwater tank 35 g, with live rock and sand. One of the rocks had a small anemone on it. We don't know what type. The tank had been set up and running for about a year when we bought it. We recently added 2 damsels and two clowns, one Percola and one Maroon. The damsels and clowns were added 3 weeks apart. We then added another live rock with a large anemone four days ago. When we first added the clowns the damsel fish bit a chunk out of the maroons tail. Now he has splits in his tail and a small white dot on his side. He is also swimming at the top of the tank using only his side fins, not his whole body as before. The anemone has shrunk considerably. He doesn't look happy either.
The salinity is 1.024
We have an aqua clear filter, T4 lights and a blower.
I have added pictures below. What could be wrong with the clown and anemone?
Do I need to address the pH?
Could you tell me what type of anemones I have in the tank?
Thank you for your help. You have a wonderful site. Fabulously informative to read!