I'm very new to corals and have been trying to read up on the ones i recently purchased thanks to my fellow members here tht gave me some great ideas for newbie corals. A friend gave me a piece of rock but i have no clue what they are:
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Also i have these 2 (toadstool leather corals and Green star polyp) in the sand .. Are they ok like this?
Also i have these 2 (toadstool leather corals and Green star polyp) in the sand .. Are they ok like this?

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