Want to prevent ulcers and other common bacterial infections in koi before they start? KOI BIO SHIELD from Koi Pond Rescue is the ultimate solution for protecting your koi from harmful Aeromonas and Pseudomonas bacteria. These bacterial strains can cause life-threatening infections such as ulcerations, fin, tail, and mouth rot. Koi Bio Shield, made from a powerful blend of bacteria and enzymes, effectively combats these pathogens, ensuring your fish remain healthy and vibrant. Use Koi Bio Shield