Wondershells are great for adding hardness and minerals into your aquarium water. If you need higher minerals for snails, shrimp, plants, goldfish or cichlids Wonder Shells are a great product for safely increasing your aquariums mineral content. They are easy to use, no dosing or measuring required. Just drop it in your aquarium. Wonder Shells will completely dissolve into your water over time.  Simply replace them with a new wondershell when they do.