What precautions need to be taken when keeping invertebrates in an aquarium?
Invertebrates are sensitive to changes in water quality. They also require calcium and alkalinity levels to be maintained at proper levels. If you plan to keep invertebrates, you will need to routinely test your calcium and alkalinity levels. You will also have to use very pure water. It is recommended to invest in a RO/DI water filtration system. Do not use tap water under any circumstances. Tap water contains many chemicals that are toxic to invertebrates. These chemicals will build up over time as you do your water changes. If you are unable to get an RO/DU filter, you can use distilled water from the grocery store. Many aquarium stores also sell premixed saltwater for use in reef aquariums.