mine would be buying green spotter puffers and putting into my brackish tank with a goby dragon. my goby didn't live to see morning ):
next would be ALL my mother buys for me.
I had to senegal(sp?) bichers, I let her put in some mollys, okay the did fine.
She put in a shunbukin(sp?), the f***er ATE ALLLLLL my bichlers food I put in,
even when I bought it its own food, put SO much anmonia in my tank, not even
water changes and chemical would bring it down past a 1.3, basically all in all
it killed everything, ATE one of the mollys and then I killed it intentionally.