He is not green emerald brittle star, not sure what type, but he is brown.
I think I have enough critters to take care of him (1 brittle star, a bunch of snails, 12 red leg hermits, 12 blue leg hermits). He's really buried deep inside a rock and there is definitely no easy way to get him out. I needed to use a flash light to even find him.
So now I have to figure out why he died. Again parameters all seem ok. I just did a 15% water change the day before. I had been using tap water, but I tested the water and it is high in phosphates, so this time I used the ro
water from a machine in the supermarket.
I mixed the salt in a tub to match SG
of tank, let it sit for 24 hrs, and brought it up to the same temperature as the tank. I then performed a normal water change.
The clown had been showing NO signs of any distress or disease. Any recommendations on how I can diagnose this further?