I need help sorting my tank out! :(

[Atmos]

alright i got a lot of good advice ill get rid of the brittle star, the cowries are sold and so are all the clownfish. and 3 of the hermit crabs so the next step is to sit back and let the sea urchins clean the algae.there is lots so i know they will grow big, after that ill get the small colorful ones. then ill sell the arrow crab by this time he should have eaten all or most of the bristle worms(i want them gone since an orange one ate a baby anemone)