Hello everyone, My mom has a koi pond and one of her fish is not doing well. Over the past couple months a sarasa has ballooned. It hasn't slowed its pace. It's still pretty active. Eats its normal share if not more. It overall hasn't changed its routine or personality. There is no scale pine-coning. I don't have any water condition measurements. The pond has been running for over 3 years. No other fish are effected. She pulled it out and has it quarantined in a 5 gallon tank. Any ideas? I will see about getting water readings. I also have some pictures that I am waiting on approval for. I will post them asap.