I recently aquired 3 dwarf puffers. They are alone in a 15 gallon freshwater tank with lots of plants, à heater, and à filter. I am breeding snails for them and have fed the frozen brine shrimp and bloodworms. They have been happily exploring for the past 2 says theeveiling been with me and I have thoroughly enjoyed theur cute little faces. I tested the water à day before they arrived, and everyday since. The tank has been set up for about 3 months, and I have been cycling iT with à single male betta. I use the API Master Test Kit for freshwater, and the parameters are practically perfect. There has been no aggresion, and everyone is being fed a bloodworm via tweezers. The one thing i am concerned about is this one fish. It was noticeably pale and has and had à black bump on its stomach upon arrival. I know that they change colors, and the paleness could be the result of shipment stress, but i am stumped by the bump on her stomach. She is à bit larger than the others, of that means anything.