Pond Boss Forums GENERAL QUESTIONS Water chemistry Why is the water black?

So glad you did not have a fish kill,SP. You live in coal country so you are apt to have discolored water at times. This can happen at high water or low water occasions. Ag. lime is one thing you can add(as per Ewest) and I am sure with your know-how and work ethic you will conquer any obstacle in your way. Take care.