The Exo Terra Calcium Liquid Supplement 4 oz is a liquid calcium-magnesium additive for reptiles and amphibians. It contains 8% highly absorbable calcium and 1% magnesium to help maintain strong bones and proper muscle function. The liquid form ensures high absorption and is easy to administer (simply add to drinking water). This supplement addresses common calcium deficiencies in captive diets, supporting healthy bone density and preventing metabolic bone disease in your pets.