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  1. ping pong balls - camphor - toxicity?

    Betta Fish Care
    I'd read on the forum that bettas might like to play with ping pong balls, so I picked up a packet at the shops. When I opened them, they smelt of camphor, so I've googled and found that ping pong balls are made of "nitrocellulose, camphor, dyes and other agents". I don't know whether camphor...