Create a calm and restorative place for your fish to call home with Dr. Tim’s Freshwater First Defense Aquarium Cleaner. This freshwater cleaner is designed to help your fish adapt to a new environment by reducing stress and promoting healthy immune systems. It contains a mixture of vitamins and immuno-stimulants to help fish fight off infections and repair injuries. It’s designed to detoxify heavy metals and remove harmful chemicals from the water. It also contains buffers to help the tank water maintain a healthy pH level. It’s ideal for bringing fishy friends home to a new tank or any time you make changes to the tank’s water or environment.