Hello! We recently moved into a house with a small patio pond that is home to a koi. Previous owners left some koi food and a couple of products, which we have used, but otherwise we’re flying blind. The water has become murky, and in the past week the water level has been dropping by about an inch a day. Husband has been replenishing it using hose water mixed with Stress Coat (apparently removes chlorine etc), but we are wondering if we have a leak and, if so, how to keep the koi safe while we address it. We are in Northern VA, in case anyone can recommend resources in this area…I did try contacting a few pond businesses that I found through a Google search, but they seem only to deal with larger-scale ponds. Any advice would be greatly appreciated…thank you in advance!