I have a 29 gallon freshwater tank with 2 silver mollies,both females?, 1 female creamsicle lyretail, which is the bully killing 2 angelfish and a male dalmatian lyretail this week, 2 male swordtail, a pleco dwarf, and a cory cat. I want to add more fish but the creamsicle is a bully and really not sure why!!?? Also tank is 1you week old and I have a sulfur smell coming from the water. I am really all new to this not sure what to do here.....:question:

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