Ok I'm new to this. I was given a 30 gallon aquarium that has been established. It came with a tige goby and a brittle/serpent starfish (don't know the difference). I brought it home saturday. Sunday I bought 3 damsels. I acclimated them very slowly for 1 1/2-2 hours. Yesterday when I went home for lunch one was dead. I tested my water and my ph level was about 7.8. My ammonia was 0 and nitrite 0. My nitrate was highest the chart showed. When I set up the aquarium I put 5 gallons of clean water that the lady gave me first then added the other 25 gal. I dont want to lose my stock so HELP please. Sunday I sat and watched my new babies for 6 hours. I didn't even watch the saints game(Louisiana resident lol). I noticed in one of my live rock about 8 or more little things sticking out. They r white and red striped with little fuzz or hairs on them. They are about 1/2-1 inch long and about the size of a hair or thread. The lady told me they r probably bristle worms and I should take em out. I looked on line and they don't look like the pics I saw. They look like starfish. Is that possible being that mine is alone. Help me make this a good experience. Thanks...