Sleepy wrote: » How big is the tank? Odds are that your tank is way too small for 2 Oranda (they need *very* large tanks, circa 250 litres for one, 400 litres for 2). Did you cycle the tank before introducing the fish? (see sticky at the top of the forum for details on cycling). An uncycled tank is going to kill fish via ammonia / nitrite poisoning. What kind of water is in the tank? Are you using a tap water conditioner? Are you testing for Ammonia, Nitrite, Nitrate and PH? Bloating like you describe could also be a result of over-feeding (it's a very common beginner mistake) but it's far more likely that it's the water that's the problem in a new setup. There's a oft-referred to quote about fish-keeping that "you don't keep fish, you keep water". Try not to beat yourself up over it, most of us here made similar mistakes when first getting into the hobby and the level of "advice" you get in most pet-shops ranges from well-meaningly under-informed to wilfully wrong (healthy fish don't sell medication and water treatments).