The DrTims Aquatics Eco-Balance for Reef Aquariums is a multi-strained, supportive probiotic bacteria that promotes optimal water quality. The treatment naturally reduces harmful algae and bacteria, including Vibrio shiloi, and restores and rebalances the fish tank environment to support a healthy fish immune system and reduce stress. For best results, add the Eco-Balance water rebalancer on a weekly basis to help maintain water quality.