Seachem MultiTest Silicate Test Kit,75 Tests Go to amazon.com Related posts List of the Top 10 seachem multitest you can buy in 2019 Feature75 testFresh or saltwater useUnique indicator DescriptionThis kit measures silicates to less than 0.5 mg/L in marine or freshwater. MultiTest Silicate performs over 75 tests and contains a reference sample for validation.