new guy on the block

[joe's reefer]

hi i got a 30 gallon and just want to set up a shark tank i want to know if there is any sharks small enough and what equipment do i need.

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[underthesea]

You are going to need a much bigger tank to start with. Plus then you are going to need a good protein skimmer, wet dry filter and good lighting, also a good thick sand bed.