The sponges are fine. The green plant looking things I have no idea. I'm a newb too. I can give you a few pointers though. Quarantine everything. Don't add anymore live rock as dry rock is cheaper and it will become live rock. Get an RODI unit if you don't have one. Get some coral dip, and medications for fish such as prazi pro, coppersafe, and metroplex. Don't buy fish anything live from PETCO unless you are wanting a sick fish to rescue. Search Humblefish and read his post on quarantine. Be patient.
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